Here's what to wear on those frigid days when it's so cold, your frozen face feels like it'll literally crack a smile. We’ve built this gaiter with the same stretch fleece used in Beargrease Base Layers – the warmest next-to-skin insulators we offer. The 4.8-oz. 90% polyester/10% spandex fleece is smooth outside, fuzzy inside with knit-in channels that capture body heat while reducing bulk. Better yet, the hearty fabric has excellent breathability and fast wicking action, so you’ll never feel clammy when working up a good head of steam. The warmth to bear any weather!