Adults Hi-Visibility Hi Vis Reversible Polar Fleece Balaclava by ProClimate These adults hi-vis polar fleece balaclava's are fully reversible can be worn as a plain black balaclava or as a hi-visible neon yellow balaclava manufactured from 2 layers of 100% polyester polar fleece fabric for softness, extra warmth and protection from the cold. The perfect accessory for lots of outdoors activities including cycling, hiking, jogging, walking, workwear and lots more.