This chair conversion kit provides maximum comfort, convenience, and protection. Just insert your Therm-a-Rest mattress and that’s that. No additional assembly or disassembly is required to convert from sitting to sleeping or packing. Simply unbuckle the side straps and the mattress unfolds to lie flat for sleeping. To pack up, pull out the support stays, then roll up the mattress and chair together. At all times the mattress remains completely encased and protected. Made with a soft nylon taslan top and durable nylon oxford bottom. Available in three sizes to accept 20-inch wide Therm-a-Rest mattresses.