The Dri-Release Micro Blend allows for outstanding warmth in a fine gauge fabric. Unlike topically finished fabrics, Dri-Release's comfort qualities are permanent and won't shrink or loose their shape and the Freshguard treatment that is embedded in the yarn virtually eliminates odor. This ultra lightweight balaclava has flat lock stitching and 3D form fitting 3 panel construction so it is ideal for layering under a helmet. This item also offers a thick and thin concept, the light weight Dri Relase fabric is used for the upper portion of the balaclava , while we combine it with our Micro Flex 4 Way Strecthc Micro fleece around the neck . The Lycra binding around the face seals out the elements and the shaped bottom provides full coverage and prevents excessive gathering. This product is excellent for skiing, snowboarding, snow machining, hunting and all cold weather activities.