Improved

Synthetic Half Liner

Lightweight layer inside your bag for additional warmth without bulk

Remedy those super cold nights with the Big Agnes Synthetic Half Liner. Quilted construction with 100% post-consumer recycled FireLine™ ECO Synthetic Insulation, this liner adds between 5-10 F° degrees of warmth to your bag. Attach the liner to loops that already exist in your current Big Agnes bag and can be used as a top or bottom layer.
$49.95
100% Guarantee

100% GUARANTEE:

Our top priority is to provide customer service as stellar as the award-winning products we create. If one of our products does not perform to your satisfaction, contact our customer service team and we will help you find gear that fits your needs.
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Specs + Sizing

Bag Weight10oz / 283g
Fill Weight5oz / 142g
Compressed Bag Size3.5" x 6" / 9 x 15cm
Stuff Sack Size4" x 10.5" / 10 x 27cm
Sleeping Bag TypeComforters, Quilts, Liners

Features

An extra layer for your warm-weather bag on chilly spring overnight, or to wrap up in while watching a free summer concert in the park

Fits any size of bag - petite, regular or long

Attaches to existing loops in Big Agnes sleeping bags as an extra layer of insulation above or below you 

Adds 5-10°F degrees to your bag

Construction + Materials

Nylon rip-stop shell fabric with a water-repellent finish

FireLine™ ECO Synthetic Insulation - 100% post-consumer recycled polyester. Features low-denier fibers that are tightly woven and provide high loft, compressibility, high weight-to-warmth ratio, and durability 

Quilted construction

Here’s what other people think.

What’s in a Name?

This liner is named after the Greek God of warmth - Sin Thetica. Due to it only being one-half of a full bag liner, we decided to commemorate our love of a warm sleeping bag and named this the Synthetic Half-Liner. We may or may not have had a few beers while naming this must-have accessory for cold-weather campers.