Sea to Summit Ultralight Insulated Mat NEW Air Sprung Cells provide unrivalled comfort and support. The UltraLight Insulated Regular is designed with 181 air sprung cells. Multi-Function Valve integrates inflation and deflation plus pressure adjustment into one low-profile design. Extruded TPU Lamination with Antimicrobial treatment prevents delamination and internal bacterial growth. Equivalent R-Value is 2.5. Thermolite with Exkin Platinum provides excellent insulation and warmth to weight ratios. High quality Nylon stuff sack and a 3M repair kit included.