Rest and relaxation is what you will get when you slide into the Porcupine JR by Big Agnes. Integrated half pad sleeve design keeps you securely attached to the pad from the hips up while allowing freedom of movement for your legs. Requires ANY 20 wide rectangular or mummy shaped pad to fit in the half pad sleeve design. Built in pillow pocket holds a fleece or Big Agnes pillow. Interior fabric loops for sleeping bag liners. YKK #8 zipper. Cotton storage sack and nylon stuff sack included. No-draft collar seals around neck to keep cold air from sneaking in. No-draft wedge insulates the connection between the bag and pad. No-draft zipper tube insulates along the length of the zipper. Shell: Lightweight nylon rip-stop with WR surface treatment to repel water. Lining: Nylon taffeta with stain resistant finish. Specifications: Pad Size - Any 20 wide. Fill Type - 600 fill goose down. Fill Weight - 12.5oz. Bag Weight - 2lb 7oz. Shoulder Girth - 63. Hip Girth - 54. Foot Girth - 37. Stuff Sack Size - S-7.5 x 15.