Chest-zip Bug Bivy
Chest-zip Bug Bivy
Chest-zip Bug Bivy
Chest-zip Bug Bivy
Chest-zip Bug Bivy

Chest-zip Bug Bivy

$100.00
Our lightest and simplest bivy, with the zipper running across the width.

The chest zipper on this bivy allows access from the front, making it best suited for use with smaller a-frame tarps. The width and height taper for efficiency, while the tub helps provide extra splash protection. Offered in two sizes and two lengths* to help dial in your setup.

  • Our lightest & simplest bivy.
  • Tapered shape for efficiency
  • Tub-floor provides extra splash protection.
  • Rigging for connecting the bivy to a tarp is included.

*If pairing with the Cirriform, the longer Bivy is best paired with the longer silpoly Cirriform (note that we also strongly recommend the Y-zip Bug Bivy over the Chest zip for pairing with the Cirriform).


Partners well with our:

Which zip is right for me?

We also offer bivys with Y-zips and Ridge zips.

  • Chest Zip: Entry from the front. Best suited for a-frame tarps, especially smaller ones. Lightest option.
  • Y-Zip: Entry from the front, side, diagonal, or above. Unzips all the way to the front corners which improves access. Well suited for most tarps. Heaviest option. Best bivy for pairing with our Cirriform Tarp, by far.
  • Ridge Zip: Entry from the side/above. Best suited for tarp pitches that allow better access from the side or from the top. Mid-weight option.

Made in Montana, USA from imported materials.

Weights

Bivy
  • Standard Length
  • Smaller: 155 g | 5.5 oz
  • Bigger: 181 g | 6.4 oz
  • Longer Length
  • Smaller: coming
  • Bigger: 204 g | 7.2 oz

  • Stuff sack: 7g | 0.25 oz
Rigging
  • 16' of 1/16" shockcord: 12g | 0.41 oz
  • 6 Clips: 5.8g | 0.21 oz
  • 2 Barrel cordlocks: 1.2g | 0.04 oz
  • Note: Rigging for connecting the bivy to your tarp is included, but you'll need to install it. You will likely not need to use all of the shockcord.
Environmental
  • Landfill waste: 113g | 4 oz
    (Average amount of landfill waste produced per bivy from in-house operations.)
  • Carbon Footprint: working on it...

Dimensions

Smaller size
  • Width at head: 32" | 81.3 cm
  • Width at foot: 25" | 63.5 cm
  • Length (regular): 84" | 213.4 cm
  • Length (long): 90" | 228.6 cm
  • Height at head: 20" | 50.8 cm
  • Height at foot: 16" | 40.6 cm
  • Tub height: 4" | 10.2 cm
Bigger size
  • Width at head: 36" | 91.4 cm
  • Width at foot: 30" | 76.2 cm
  • Length (regular): 84" | 213.4 cm
  • Length (long): 90" | 228.6 cm
  • Height at head: 23" | 58.4 cm
  • Height at foot: 17" | 43.2 cm
  • Tub height: 6" | 15.2 cm

Materials

  • Floor: 20D Silpoly; Hydrostatic head: >4500mm
  • Upper: 0.6 oz Noseeum netting
  • Zipper: YKK size #3
  • Stuff sack: 20D Silpoly

Download our PDF pitching guide here.

The tub-floor is intended to be suspended from its top corners by clipping them out to your tarp's corners using the included rigging. Suspend the upper off or your face and feet by clipping it to points above. Or, simply let the bivy drape over you, maybe suspending the front apex to keep the netting off of your face. For recommendations on how to install the rigging, please see the "Rigging" tab.

You may wish to seam seal the corners of the tub-floor. It shouldn't be necessary for most situations, but may be helpful should you find water pooling on the ground around you.

For simpler set-up when pitched without a tarp, consider using the Stand-alone rigging kit which allows the bivy to be pitch with only 4 stakes and your poles. For more information, please see the link.

To get started

Included: Rigging (shock cord, clips, and cord locks) is included with the bivy. See the Specs for exactly what the bivy comes with.

You'll want to attach rigging to 6 locations on the bivy: top corners of the tub (4) and apexes (2).

To determine the length of the cords: Lay the bivy under your pitched tarp. Then, measure the distance from the bivy's corner to the tarp's associated corner. Cut the shock cord to that length (the two front lengths should be equal, as should the two lengths at the foot).


To install the cords:

You don’t need to follow our method, but this is how we like to do it.

At the corners

  1. Tie a loop on one end of the shock cord. We like to use a simple overhand loop knot.
  2. Using a clinch knot, tie on a mitten hook to the other end of the cord.
  3. Attach the loop end of the cord to the tub with a girth hitch.

At the apexes

  1. Tie a loop on one end of the shock cord using an overhand loop knot.
  2. Pass the free end of the cord through a cord lock.
  3. Pass the free end of the cord through the small webbing loop at the apex.
  4. Using a clinch knot, tie on a mitten hook to the free end of the cord.
  5. NOTE: On the Ridge & Y-zip, webbing loops are found on both sides of the zipper at the front apex. Pass the cord through the loop on the side opposite the side you'd like to bivy to open towards.

Stand-alone rigging kit:

For pitching the bivy on its own, we also offer a stand-alone rigging kit. This lightweight kit allows you to pitch the bivy with your poles and just four stakes. Please see the rigging kit's page for more information and instructions.

Product Availability

Unless otherwise stated, if the item is available to add to your cart, then it is in-stock and available to ship. Please see the shipping tab for expected fulfillment times.

If the item is marked as "sold out" or "available to backorder" then please refer to the production calendar and the FAQ below for more information.


Q: What is the "Inactive Product" Category?

A: Products in the "Inactive Product" category are not expected to be available any time soon. While I intend to offer them again, they are 'on-hold' indefinitely so that we can focus attention on other products.


Q: Why is so much stuff sold out?!

A: Our capacity is very limited, and we can't make products nearly quickly enough to meet demand. We only sell what I have in-stock, and don't typically take backorders. I know this can make it hard for you to plan, but in the longer term, it should help us to grow and to serve you better in the long term. See the last question for more info about this.


Q: When can I expect the item I'm interested in to become available?

A: For most items, please refer to the production calendar at the bottom of this page. This calendar shows when I expect to work on more substantial products. For some accessory products, production may not always be scheduled in advance and availability may be unpredictable.

FYI: If you do not see the item that you are interested in, then I do not know when it may become available (I don't have a private schedule beyond what's shown!).


Q: Can I pre-order, back-order, or reserve an item?

A: I'm afraid not. Out of fairness to everyone, I don't make special arrangements to reserve products. On rare occasions, I may open a product up for back-ordering to everyone (or a new product for pre-ordering). When this happens, it's made available to order on the website. If you are signed up for the stock notification, you will receive a notice that the item is available to order.


Q: Can you let me know when the item becomes available?

A: Yes. On the product page, enter your email address in the space provided to be automatically notified when inventory becomes available. If you don't see where you can do this, please let me know; sometimes there's a fluke in the settings and the field doesn't show. Please note that the email notification could get filtered out as spam. You can try to 'whitelist' info@yamamountaingear.com to make sure the email comes through.


Q: Why do you do things this way, and what are you doing to improve the situation?

A: For years I followed the more common back-order model, basically making everything to order. This approach made it challenging to increase production, limited time available to design new products or refine existing ones, impacted my personal/outdoor time, and meant long waits to get your gear delivered. I changed my approach when I moved to Montana in 2019. Offering only what's already made allows me to work and plan more efficiently, and opens up hiring opportunities.


NOTES ON USING THE CALENDAR

- For products shown on the calendar, you can typically expect the item to be made available towards the end, or soon after the period shown on the calendar. Sometimes, however, some items may be listed earlier in the period. For example, if the calendar shows that I'm working on tapered tarps, certain sizes may become available earlier within the period with other sizes coming later.

- Items that specify "ongoing production" mean that we are continually working on these items and doing our best to maintain inventory. If the item or a particular size is sold out, you can expect it to likely become available soon.

- Please note that you can change the month shown on the calendar using the arrows at the top.

Shipping Information


While most orders ship out within 1 - 3 business days, please allow up to one week for us to ship your order. This gives us some scheduling flexibility for getting out on the trail!*

*If you select seam sealing services with your purchase, please allow a few extra days for us to seal the item(s) and ship your order.


Domestic Rates

Order Total Shipping Fee Shipping Method Typical Transit Time
(business days)
under $50 $3.25 USPS First Class 2 - 5
$50.00 to $99.99 $5.15 USPS First Class 2 - 5
$100.00 to $199.99 $6.95 USPS First Class / Priority 2 - 3 for Priority
2 - 5 for First Class
$200.00 to $349.99 $9.95 USPS Priority 2 - 3 for Priority
$350.00 to $499.99 $12.95 USPS Priority 2 - 3 for Priority
Over $500 $15.95 USPS Priority 2 - 3
Note: Stickers and DCF Patches ship for free

International

I'm sorry, but for the foreseeable future, I'm not able to offer international shipping.

Description

Our lightest and simplest bivy, with the zipper running across the width.

The chest zipper on this bivy allows access from the front, making it best suited for use with smaller a-frame tarps. The width and height taper for efficiency, while the tub helps provide extra splash protection. Offered in two sizes and two lengths* to help dial in your setup.

  • Our lightest & simplest bivy.
  • Tapered shape for efficiency
  • Tub-floor provides extra splash protection.
  • Rigging for connecting the bivy to a tarp is included.

*If pairing with the Cirriform, the longer Bivy is best paired with the longer silpoly Cirriform (note that we also strongly recommend the Y-zip Bug Bivy over the Chest zip for pairing with the Cirriform).


Partners well with our:

Which zip is right for me?

We also offer bivys with Y-zips and Ridge zips.

  • Chest Zip: Entry from the front. Best suited for a-frame tarps, especially smaller ones. Lightest option.
  • Y-Zip: Entry from the front, side, diagonal, or above. Unzips all the way to the front corners which improves access. Well suited for most tarps. Heaviest option. Best bivy for pairing with our Cirriform Tarp, by far.
  • Ridge Zip: Entry from the side/above. Best suited for tarp pitches that allow better access from the side or from the top. Mid-weight option.

Made in Montana, USA from imported materials.

Specifications

Weights

Bivy
  • Standard Length
  • Smaller: 155 g | 5.5 oz
  • Bigger: 181 g | 6.4 oz
  • Longer Length
  • Smaller: coming
  • Bigger: 204 g | 7.2 oz

  • Stuff sack: 7g | 0.25 oz
Rigging
  • 16' of 1/16" shockcord: 12g | 0.41 oz
  • 6 Clips: 5.8g | 0.21 oz
  • 2 Barrel cordlocks: 1.2g | 0.04 oz
  • Note: Rigging for connecting the bivy to your tarp is included, but you'll need to install it. You will likely not need to use all of the shockcord.
Environmental
  • Landfill waste: 113g | 4 oz
    (Average amount of landfill waste produced per bivy from in-house operations.)
  • Carbon Footprint: working on it...

Dimensions

Smaller size
  • Width at head: 32" | 81.3 cm
  • Width at foot: 25" | 63.5 cm
  • Length (regular): 84" | 213.4 cm
  • Length (long): 90" | 228.6 cm
  • Height at head: 20" | 50.8 cm
  • Height at foot: 16" | 40.6 cm
  • Tub height: 4" | 10.2 cm
Bigger size
  • Width at head: 36" | 91.4 cm
  • Width at foot: 30" | 76.2 cm
  • Length (regular): 84" | 213.4 cm
  • Length (long): 90" | 228.6 cm
  • Height at head: 23" | 58.4 cm
  • Height at foot: 17" | 43.2 cm
  • Tub height: 6" | 15.2 cm

Materials

  • Floor: 20D Silpoly; Hydrostatic head: >4500mm
  • Upper: 0.6 oz Noseeum netting
  • Zipper: YKK size #3
  • Stuff sack: 20D Silpoly

Set-up & use

Download our PDF pitching guide here.

The tub-floor is intended to be suspended from its top corners by clipping them out to your tarp's corners using the included rigging. Suspend the upper off or your face and feet by clipping it to points above. Or, simply let the bivy drape over you, maybe suspending the front apex to keep the netting off of your face. For recommendations on how to install the rigging, please see the "Rigging" tab.

You may wish to seam seal the corners of the tub-floor. It shouldn't be necessary for most situations, but may be helpful should you find water pooling on the ground around you.

For simpler set-up when pitched without a tarp, consider using the Stand-alone rigging kit which allows the bivy to be pitch with only 4 stakes and your poles. For more information, please see the link.

Rigging

To get started

Included: Rigging (shock cord, clips, and cord locks) is included with the bivy. See the Specs for exactly what the bivy comes with.

You'll want to attach rigging to 6 locations on the bivy: top corners of the tub (4) and apexes (2).

To determine the length of the cords: Lay the bivy under your pitched tarp. Then, measure the distance from the bivy's corner to the tarp's associated corner. Cut the shock cord to that length (the two front lengths should be equal, as should the two lengths at the foot).


To install the cords:

You don’t need to follow our method, but this is how we like to do it.

At the corners

  1. Tie a loop on one end of the shock cord. We like to use a simple overhand loop knot.
  2. Using a clinch knot, tie on a mitten hook to the other end of the cord.
  3. Attach the loop end of the cord to the tub with a girth hitch.

At the apexes

  1. Tie a loop on one end of the shock cord using an overhand loop knot.
  2. Pass the free end of the cord through a cord lock.
  3. Pass the free end of the cord through the small webbing loop at the apex.
  4. Using a clinch knot, tie on a mitten hook to the free end of the cord.
  5. NOTE: On the Ridge & Y-zip, webbing loops are found on both sides of the zipper at the front apex. Pass the cord through the loop on the side opposite the side you'd like to bivy to open towards.

Stand-alone rigging kit:

For pitching the bivy on its own, we also offer a stand-alone rigging kit. This lightweight kit allows you to pitch the bivy with your poles and just four stakes. Please see the rigging kit's page for more information and instructions.

Availability

Product Availability

Unless otherwise stated, if the item is available to add to your cart, then it is in-stock and available to ship. Please see the shipping tab for expected fulfillment times.

If the item is marked as "sold out" or "available to backorder" then please refer to the production calendar and the FAQ below for more information.


Q: What is the "Inactive Product" Category?

A: Products in the "Inactive Product" category are not expected to be available any time soon. While I intend to offer them again, they are 'on-hold' indefinitely so that we can focus attention on other products.


Q: Why is so much stuff sold out?!

A: Our capacity is very limited, and we can't make products nearly quickly enough to meet demand. We only sell what I have in-stock, and don't typically take backorders. I know this can make it hard for you to plan, but in the longer term, it should help us to grow and to serve you better in the long term. See the last question for more info about this.


Q: When can I expect the item I'm interested in to become available?

A: For most items, please refer to the production calendar at the bottom of this page. This calendar shows when I expect to work on more substantial products. For some accessory products, production may not always be scheduled in advance and availability may be unpredictable.

FYI: If you do not see the item that you are interested in, then I do not know when it may become available (I don't have a private schedule beyond what's shown!).


Q: Can I pre-order, back-order, or reserve an item?

A: I'm afraid not. Out of fairness to everyone, I don't make special arrangements to reserve products. On rare occasions, I may open a product up for back-ordering to everyone (or a new product for pre-ordering). When this happens, it's made available to order on the website. If you are signed up for the stock notification, you will receive a notice that the item is available to order.


Q: Can you let me know when the item becomes available?

A: Yes. On the product page, enter your email address in the space provided to be automatically notified when inventory becomes available. If you don't see where you can do this, please let me know; sometimes there's a fluke in the settings and the field doesn't show. Please note that the email notification could get filtered out as spam. You can try to 'whitelist' info@yamamountaingear.com to make sure the email comes through.


Q: Why do you do things this way, and what are you doing to improve the situation?

A: For years I followed the more common back-order model, basically making everything to order. This approach made it challenging to increase production, limited time available to design new products or refine existing ones, impacted my personal/outdoor time, and meant long waits to get your gear delivered. I changed my approach when I moved to Montana in 2019. Offering only what's already made allows me to work and plan more efficiently, and opens up hiring opportunities.


NOTES ON USING THE CALENDAR

- For products shown on the calendar, you can typically expect the item to be made available towards the end, or soon after the period shown on the calendar. Sometimes, however, some items may be listed earlier in the period. For example, if the calendar shows that I'm working on tapered tarps, certain sizes may become available earlier within the period with other sizes coming later.

- Items that specify "ongoing production" mean that we are continually working on these items and doing our best to maintain inventory. If the item or a particular size is sold out, you can expect it to likely become available soon.

- Please note that you can change the month shown on the calendar using the arrows at the top.

Shipping

Shipping Information


While most orders ship out within 1 - 3 business days, please allow up to one week for us to ship your order. This gives us some scheduling flexibility for getting out on the trail!*

*If you select seam sealing services with your purchase, please allow a few extra days for us to seal the item(s) and ship your order.


Domestic Rates

Order Total Shipping Fee Shipping Method Typical Transit Time
(business days)
under $50 $3.25 USPS First Class 2 - 5
$50.00 to $99.99 $5.15 USPS First Class 2 - 5
$100.00 to $199.99 $6.95 USPS First Class / Priority 2 - 3 for Priority
2 - 5 for First Class
$200.00 to $349.99 $9.95 USPS Priority 2 - 3 for Priority
$350.00 to $499.99 $12.95 USPS Priority 2 - 3 for Priority
Over $500 $15.95 USPS Priority 2 - 3
Note: Stickers and DCF Patches ship for free

International

I'm sorry, but for the foreseeable future, I'm not able to offer international shipping.