N-Ferno 6821 Fleece Balaclava: Fleece Balaclava: Stretch fleece keeps head and neck comfortable. High-quality thermal fleece, warmth in cold conditions. Stretchable material - flexible to fit most head sizes. Long length - Full thermal head/neck coverage that tucks into jackets. Fits comfortably under a hard hat or helmet. Helps keeo wearers seen and safe. Ergodyne N-Ferno. Balaclava is a long length winter protective and is FR treated for better safety.