Constructed of durable thermal insulating neoprene, the ZANheadgear? NEO-X Face Mask with Neck Sheild provides great face and neck protection against the wind, but also features a replaceable soft bamboo fiber filter that creates an antibacterial barrier against dust and debris. Additionally, the adjustable metal nose piece and neoprene lip ensures a comfortable, yet secure fit that prevents eyewear fogging. Each mask comes with 3 biodegradable filters. Skull Face design.