The high quality die-cut foam is lightweight and compressible with reliable warmth. The 3.8 cm high mat has an R-value of 3.2 for comfort in three seasons. The versatile, self-inflating mat has a high-quality WingLock valve that allows the mat to inflate three times faster thanks to the larger opening and one-way inflation. Like all Therm-a-Rest mats, the Trail Lite is made domestically for quality and environmental protection. It comes with a compact stuff sack.