SKU: SS22865 Weighs: 855g R-Value: 4.8 Season Rating: Winter Mat Size: Regular Mat Type: Airbeds If you are looking for durability over weight and a 4 Season mat in a full rectangular format then this mat could well be the one you are looking for. Exped says: The Exped Dura 5R M is a durable, extra-warm mat for dema… Dura 5R M Sleeping Mat