SKU: SS22852 Weighs: 438g R-Value: 2.9 Season Rating: 3 Season Mat Size: Regular Wide Mat Type: Airbeds If your focus is on weight and pack size but you still want a wide mat and a definite 3 season rating then the Ultra 3R MW could be it - at 438grams there's only a modest weight penalty compared to a standard sized mat. … Ultra 3R MW Mummy Sleeping Mat