Cotton Flannel Liner Made in Canada for the Army Down filled sleeping bag sets Approx 78"x 26" Cotton Flannel liner gets more comfy as you continue to wash it. Sliding into a Nylon Bag in your Skivvy's is a Chilly Prospect but the Liner is a lovely welcoming addition. The liner was introduced to reduce sleeping bag cleaning frequency. After a trip you simply wash the Liner and it comes out better than before. Also great as a Bivy bag liner for Summer trips. Increases your sleeping bag temp rating by 10%. Increases your comfort and ease of Cleaning by 75% It's all Win!