Thermarest Backpacking Pads Trail Pro Sleep Pad Pine Regular 13216. The self-inflating foam measures 3 inches (7.6 cm) and features our StrataCore construction a design that provides the best warmt-to-weight ratio of any self-inflating foam construction. The Trail Pros 4.4 R-value allows adventurers to enjoy backpacking and camping year round. 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. Like all Therm-a-Rest pads the Trail Pro is made in market to ensure quality and minimize environmental impact. The pad includes a compact stuff sack.