Winner of the prestigious Editors Choice Award from Backpacker magazine in 2004, the Big Agnes Insulated Air Core Mummy Sleeping Pad takes the best features of the popular Air Core and add PrimaLoft synthetic insulation to create the ultimate air chamber pad. The two track pads are constructed using a lightweight die cut foam core, while the Hinman pads are solid foam core pads that deliver comfort and value. Performance features include durable, lightweight 50D nylon diamond rip-stop top and bottom, light and compact three season pad, with 2.5 of comfort, PrimaLoft eco: synthetic insulation made from 50 recycled materials, M3 synthetic insulation used in the 25 wide pad, and I-beam construction that eliminates welded seams to reduce cold spots and ensures quick inflation/deflation, Big Agnes sleeping pads are designed to provide years of comfortable nights in the backcountry. The Air Core air chamber sleeping pad has gained a huge following due to its light weight and small packed size. This pad is rated to 15 degrees comfort.