The ultimate lightweight pillow! At 3.5 ounces, the Big Agnes Air Core Pillow is comfortable, compact, and perfect for sweet dreams outdoors. Made of 70D nylon. Use instead of your lumpy, bumpy, balled-up fleece jacket. I-beam construction provides support and air flow. Fits in the pillow pocket of Big Agnes sleeping bags. Mesh storage sack included. Measures: 12 x 16 x 2.5 in.. Weighs: 3.5 ounces.