The design made by a guy named Risk. Basically it is it DWR 1.1 ripstop nylon wrapped around the hammock. Included in my system is a 1/4" Oware pad cut to size inside the hammock. 20* Sleeping bag included. This very light system kept me warm below 30* The problem is major condensation! I thought the ripstop nylon was breathable. Any way to wash/clean the DWR out of the fabric? Thanx ahead, Bill