Zero Residue UV Blocking Spray for Better Camouflage ConcealmentAtsko Zero UV Killer Spray uses a zero residue hypo allergenic formula to block ultraviolet reflection and luminescence on fabrics. It helps eliminate brighteners from clothing so camouflage appears far less visible to deer and other game. Zero residue formula Hypo allergenic design Blocks UV reflection and luminescence Works on all fabrics Helps eliminate clothing brighteners