Light and packable for minimalist fast hikes, the Ultralight Self-Inflating mats come in at 1 inch thick with the regular size weighing just over 1 pound. We keep the weight down by using a 30-D polyester and our Delta Core-V? vertical coring which keeps body contact areas warmer while still offering great support and packability. Features: - Utilizes Delta Core-V? technology, which keeps body contact areas warmer while still offering great support and packability- Multi-function, patent-pending multi function valve twists over to allow the mat to be rolled tightly without fighting re-inflation as you go- At 1 inch thick and an equivalent R-Value of 2.6, the Ultralight SI Mat delivers a great weight to warmth ratio for minimalist hikers Specifications for Large size:- Length: 198 cm- Width: 64 cm- Height/Depth: 2.5 cm- Weight: 720g- R-Value: 2.6- Rolled Size: ø11 x 27 CM