Sea to Summit Comfort Plus Rectangular Mat NEW Air Sprung Cells provide unrivalled comfort and support. The Comfort Plus Regular Rectangular is designed with 596 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 High quality Nylon stuff sack and a 3M repair kit included.