ScentLok Men's Thundertek Insulated Bib Overalls 100% Polyester Scent-Lok activated carbon virtually eliminates odor and substantially reduces the chance of being detected. Long hip-length zippers with scent flap for easy field dressing Activate garment before use in the field. Place in household dryer on high heat for 40 mins; immediately store in an air tight container. For best results store in Scent-Lok lined bag. Repeat process every 30-40 hrs of use. Do not use commercial dryers. CN