The Thermarest Womens Trail Lite combines outstanding comfort, value and packability to create the perfect companion for your next backpacking or camping adventure. The die-cut premium foam is light and packable while still delivering critical warmth at camp. The 1.5-inch (3.8 cm) pad boasts a 4.5 R-value for three-season comfort. The versatile self-inflating pad features the high-performance WingLock valve, which has three times the airflow rate of the classic valve thanks to a larger opening and one-way inflation. Womens Trail Lite WR Sleeping Mat