This is a hybrid self-inflating mat & closed cell foam mattress that is rugged & puncture-resistant. It sandwiches the air-holding seal between a top layer of open-cell foam & a bottom layer of closed-cell foam then joins them with a foam-to-fabric bond. Weight (Regular Size): 1.1kg Dimensions: 183cm x 51cm x 3.8cm (flat), 53cm x 13cm (rolled)