By combining an innovative SpeedValve 8482 with a super comfortable AirFrame 8482 construction this Therm-a-Rest Trail King SV sleeping mat is an incredibly reliable comfortable easy to use self-inflating mat that claims to be the fastest self inflating backpacking mattress from Thermarest The AirFrame 8482 construction on this self-inflating mattress offers a generous 6 3cm of high loft support which is much thicker than Therm-a-Rest s original Basecamp and ProLite self inflating mat to offer you the extra comfort for an excellent nights sleep on camp The SpeedValve 8482 technology combined with self-inflating foam creates a fast inflation while the auto-reversing valve allows for a much quicker deflation too making this an excellent choice of thick comfortable camping mat This Trail King SV weighs in at just over 800g making it the perfect balance of extreme comfort and speed to inflate making this an excellent 3 season mat ideal for car camping and getting a restful nights sleep at basecamp for a few days