CleanSpace Ultra & EX Head Harness is designed to be used with the CleanSpace Ultra or CleanSpace EX PAPR Power Units (PAF-0060 & PAF-0070). The Head Harness comes with every CleanSpace Ultra and CleanSpace EX PAPR. The part (PAF-0073) is a spare used for replacement in case of damage or loss. The Head Harness is made of TPU plastic, neoprene with nylon clips.