SKU: SS22868 Weighs: 955g R-Value: 7.8 Season Rating: Winter Mat Size: Regular Mat Type: Airbeds If you are looking for durability over weight and an 'Extreme Cold' mat in a full rectangular format then this mat could well be the one you are looking for. Exped says: The Exped Dura 8R M is a durable, extra-warm mats … Dura 8R M Sleeping Mat