The lightweight, self-inflating ProLite Apex can be compressed to a small size and boasts the legendary support of Therm-a-Rest. The self-inflating foam is 5 cm high and features a StrataCore construction with the best warmth-to-weight ratio of all self-inflating foam mats. Thanks to an R-value of 3.8, adventurers can brave the cold in three seasons with the ProLite Apex. The easily compressible, self-inflating mat is equipped with a high-quality WingLock valve, which allows the mat to be inflated three times faster thanks to the larger opening and one-way inflation. Like all Therm-a-Rest mats, the Trail Pro is manufactured domestically for quality and environmental protection reasons.