The Exped Synmat UL Pad is a great option when it comes to ultralight sleeping pads. In this review we look at the Synmat UL M insulated pad from Exped and how it performed in the field in various conditions for us over the last year. Coming in at just 16.8 ounces and a super comfortable 2.8 inches thick, the Exped Synmat UL comes in multiple sizes, including both mummy and rectangular so you can choose what size and shape fits your needs best.