Stay cozy on the go with this Sea to Summit Silk Blend Rectangular Sleeping Bag Liner with Pillow Sleeve. It is made with 72% Thermolite® Pro yarns with infrared technology and 28% silk for warmth and soft comfort, and the liner is made with comfort stretch panels along the seams for added comfort. Sea to Summit Silk Blend Rectangular Sleeping Bag Liner with Pillow Sleeve Light Blue - Famly/Tech Sleepn Bags at Academy Sports