Year-Round Warmth: ThermaCapture(TM) technology and Triangular Core Matrix(TM) construction radiate body heat and reduce convective heat loss to deliver a 4.5 R-value, good for year-round conditions. Boosted Comfort: A 3-inch (7.6 cm) thick profile delivers premium backcountry comfort and extra room for better personal firmness adjustment. WingLock(TM) Valve: Delivers fast one-way inflation and rapid deflation without giving up the ability to easily purge air while you lay on it for comfort micro-adjustments. Weight: 13 oz Width: 20 inches (Regular), 25 inches (Regular Wide & Large) Length: 72 inches (Regular), 77 inches (Large) Thickness: 3 inches R-Value: 4.5 Fabric: 30D rip HT Nylon