The Thermarest BaseCamp Mat is a warm and comfy pad that features 2 inches (5 cm) of premium self-inflating foam, offering campers a 6.0 R-value for better nights under the stars. Thoughtful face fabrics are light and soft for your 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. BaseCamp XL Sleeping Mat