PolyStretch Sleeping Bag Liner - Knitted Polyester
Product Description Upgrade your sleep system with the PolyStretch™ Sleeping Bag Liner — designed to add comfort, warmth, and versatility to your outdoor adventures. Made from soft, stretchy knitted polyester, this liner moves with you through the night while boosting the warmth of your sleeping bag by 8–15°F. Use it on its own as a lightweight sleeping bag for warmer nights, or attach it inside your sleeping bag with the built-in snap loops for added warmth. Includes a drawstring cinch top for heat retention and a rounded foot box to keep your feet cozy. Weighing just 11 oz (with an additional 12 g for the carry bag), it packs down small, making it a compact, lightweight essential for backpacking, camping, or travel. Key Features Soft & Stretchy Comfort: Polyester knit fabric provides comfort, flexibility, and unrestricted movement. Versatile Use: Use alone on warm nights or attach inside a sleeping bag with snap loops for added insulation. Added Warmth: Boosts sleeping bag temperature rating by approximately 8–15°F. Custom Heat Retention: Drawstring top helps seal in warmth when temperatures drop. Warm Foot Box: Rounded design improves heat retention around the feet. Lightweight & Packable: Weighs just 11 oz (carry bag adds 12 g) and packs down small. Easy Care: Lightweight, compact, and machine washable for simple maintenance. Dimensions inside the carrying bag are 7 x 4 inches (non-compressed) Technical Specs Best Use Temperature Boost, Moisture Control, Lightweight Packability Material Knitted Polyester Added Warmth 8-15ºF Weight 11 oz Dimensions 72 x 28 in Packed Size 7 x 4 in Pack Size 8 x 6
Product Description
Upgrade your sleep system with the PolyStretch™ Sleeping Bag Liner — designed to add comfort, warmth, and versatility to your outdoor adventures. Made from soft, stretchy knitted polyester, this liner moves with you through the night while boosting the warmth of your sleeping bag by 8–15°F.
Use it on its own as a lightweight sleeping bag for warmer nights, or attach it inside your sleeping bag with the built-in snap loops for added warmth. Includes a drawstring cinch top for heat retention and a rounded foot box to keep your feet cozy.
Weighing just 11 oz (with an additional 12 g for the carry bag), it packs down small, making it a compact, lightweight essential for backpacking, camping, or travel.
Key Features
Soft & Stretchy Comfort: Polyester knit fabric provides comfort, flexibility, and unrestricted movement.
Versatile Use: Use alone on warm nights or attach inside a sleeping bag with snap loops for added insulation.
Added Warmth: Boosts sleeping bag temperature rating by approximately 8–15°F.
Custom Heat Retention: Drawstring top helps seal in warmth when temperatures drop.
Warm Foot Box: Rounded design improves heat retention around the feet.
Lightweight & Packable: Weighs just 11 oz (carry bag adds 12 g) and packs down small.
Easy Care: Lightweight, compact, and machine washable for simple maintenance.
Dimensions inside the carrying bag are 7 x 4 inches (non-compressed)
Technical Specs
| Best Use | Temperature Boost, Moisture Control, Lightweight Packability |
| Material | Knitted Polyester |
| Added Warmth | 8-15ºF |
| Weight | 11 oz |
| Dimensions | 72 x 28 in |
| Packed Size | 7 x 4 in |
| Pack Size | 8 x 6 |
Shipping costs are non-refundable.
For processing a return, please ship to the below address and reference your order number on the shipping label or within the box.
Near Zero
Attn: Returns
2036 N. Gilbert Rd
Ste 2-310
Mesa, Arizona 85203
Near Zero offers a limited 1 year exchange or store credit warranty on all of our products, and 90 days for refunds. To be considered for a refund, the return must be requested within 90 business days of delivery.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.
To start a return, you can contact us at support@nearzero.co. Please note that returns will need to be sent to the following address:
Near Zero
Attn: Returns
1045 E. McKellips Rd. Bldg B
Mesa, AZ 85203
Or, we can issue a return shipping label for you. The return shipping cost of the label can be deducted from your refund.
You can always contact us for any return question at support@nearzero.co.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like fuel. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on used gear, discounted closeout items or gift cards.
Exchanges
If you are interested in doing an exchange, please let us know and will initiate the exchange for you, and provide a return shipping label for the exchanged item.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at support@nearzero.co.