The newest addition to our tried-and-true ProLite family adds warmth and thickness without adding additional weight. The lightweight Apex offers year-round warmth and comfort thanks to its unique StrataCore construction. The two-inch thick mattress ensures that you stay comfy during your backpacking adventures. Stuff sack included. In its second generation, the Therm-a-Rest Prolite Apex Sleeping Pad boasts an unrivaled warmth-to-weight ratio for our year-round backcountry adventures. Its unique, two-inch StrataCore construction uses a continuous layer of foam between alternating ridges of foam and air to claim the best warmth-to-weight ratio of any self-inflating mattress currently on the market. Plus, the pad compacts down smaller than a paper towel roll making it the ideal companion for a comfortable sleep on our fast and light missions on the trails. -Light, packable sleeping pad for backcountry adventures year-round -StrataCore foam construction yields a high warmth-to-weight ratio -Self-inflating foam allows for a quick and easy set up at camp -Pad compacts down smaller than a paper towel roll for an easy carry -Therm-a-Rest designs are at the forefront of comfort and innovation -Stuff sack included