One of the biggest contributors of human scent is the head and neck area. Some of the major factors are breath, hair and mouth odors as well as odors from the top of the head. The Lightweight Tonal Hat is Scent-Lok's lightest carbon lined cap ever with Carbon Alloy fused within the moisture wicking knit fabric.Featuresa Carbon Alloy technology provides maximum odor adsorption a Gold + Alloy technology for maximum odor preventiona Wicking treatment to wick sweat and keep you coola Polyester interlock inner & outer fabric provides a smooth and quiet weara Moldable bill allows for a custom fita Rear adjuster provides a custom and secure fit