SEA TO SUMMIT Camp Mat S.I. Regular Size: 183 x 51 cm, Thickness: 3.8 cm R-value = 4.2 Purchased May 2024. Air pump used for inflation. Used a sleeping bag (envelope type) spread out as a sheet. Stored after drying at home after use. Instruction manual and repair patches included. I took good care of it, but it was used for camping, so there may be some dirt. Please refrain from purchasing if you are sensitive to this.