Our Classic Comfort 3.8 Mat combines two different foam constructions to optimise comfort and warmth, making it ideal for all but the most demanding use. It features 38mm lightweight bilateral cored foam for low pack size and comfort, with a central warmzone featuring denser foam construction for added insulation and support. The top surface is 30D ripstop polyester with a non-slip silicone print, and the base is 30D ripstop polyester with a non-slip reinforced finish. It has a large push-in valve for efficient inflation and deflation and is supplied with a lightweight stuff sack. The R value is 3.2 tested to ASTM F3340. Inflated dimensions for Regular size are 183 x 51 x 3.8 cm, and packed dimensions are 29 x 15 cm. The weight for the Regular size is 700g/1lbs 9oz.