Viper Tactical Neck Gaiter Scarf Hunting Fleece Hiking Outdoor Military Titanium. This highly breathable and stretchable Tactical Neck Gaiter from Viper is made of soft fleece Polyester with an elasticated drawcord and provides a high level of protection against wind and cold. This extra warm scarf is perfect for highly demanding field tasks as well as for everyday use during colder seasons. One size fits most. Stretchable and highly breathable. Soft fleece material for extra warmth.