Self Inflating Air Mattress is made from high-density premium grade open cell foam that is fully bonded to the outer fabric surface; Durable 1500 Oxford nylon shell holds bag securely to the pad and will stand up to many years of rugged 4-season use; Brass valve with nylon cover provides an air tight seal even under the coldest conditions; 4000mm P.U. coating; 25" x 72" x 1-1/2" 3 lbs.; Forest Green color.