The therm a rest prolite mattress39 are tailor made for anyone seeking lightweight three season comfort in this mattress minimal weight and packed size are as much a priority as reliable performance and comfort the result is a mattress that is ideal for high mileage high speed journeys where weight and warmth are key stuff sack included the prolite mattress is the lightest most compact self inflating mattress available ideal for 3 season backpacks climbs and treks