It's no wonder Sea to Summit's Rectangular Comfort Plus Sleeping Pad is a favorite among backpackers. The dual layer design keeps at least half of the air if one side gets punctured, and you can moderate R value, support, and cush by filling different amounts of air on both sides. Air Sprung Cells mimic mattresses with coil springs for home like comfort, and the multi function valve pumps in and dumps out air in the most innovative and efficient ways. TPU laminated ripstop fabric stays strong and clean in muddy and rocky conditions. Sea to Summit included a stuff sack and repair kit with six adhesive patches and a valve flap.