Klymit Insulated Klymaloft has everything you love about the classic Klymaloft along with an ASTM R-Value of 7.0 for four-season comfort. Insulated for Four-Season Comfort, Luxurious Plush Foam Topper Conforms to Support the Body and Eliminate Pressure Points Stretch Polyester Fabric Is Soft and Quiet, I-Beam Air Chambers Create Loft and Stabilize the Sleeping Pad, Air and Foam Combination Strikes the Perfect Balance between Comfort, Pack Size, and Weigh, Inflation Is Fast and Easy with Included Pump Stuff Sack.