Built to Backpack: With a weight of 30 oz (RW), or 850 grams, a packed size not much larger than a 1L water bottle and a 4.7 R-value, the NeoLoft allows you to take car camping comfort deep into the backcountry. 3D Construction: A 4.6-inch-thick (11.7 cm) profile and a broad, taper-free sleep surface is ideal for side sleepers, nighttime movers and any sleeper that likes comfort-so everyone, really. Stretch Knit Fabric: Super soft and base layer-like, its stretch properties are key to the NeoLoft&';s contouring support. ContourCore Matrix(TM): Thermally-efficient air pad construction made with comfort-forward materials allows the NeoLoft to contour, cushion, support, insulate and pack down small. Weight: 1 lb 9 oz (Regular), 1 lb 14 oz (Regular Wide), 2 lbs (Large) Width: 22 inches (Regular), 26 inches (Regular Wide & Large) Length: 73 inches (Regular), 78 inches (Large) Thickness: 4.6 inches R-Value: 4.7 Top Fabric: 50D polyester knit Bottom Fabric: 75D polyester solution dyed