Neck Warmer Measures 9.8" X 11.8" And Is Constructed Of Lightweight And Breathable 100% Polyester Polar Fleece Material Extreme Cold Weather Neck Warmer Provides Protection From Cold, Wind And Debris Neck Tube Can Adjust To Cover The Neck, Mouth And Ears Can Be Worn As A Neck Gaiter, Open Balaclava, Half Face Mask, And Much More Perfect For Military Personnel, Running, Snowboarding, And Many Other Outdoor Activities.