The Proximity LT Beanie is warm, windproof, and versatile for variable cold and windy conditions Built from an innovative three-layer fabric construction, Proximity LT combines a quiet, micro-fleece outer layer, a windproof SynthaCell® foam membrane, and an ultra-soft and comfortable grid-fleece liner. You get increased wind protection, warmth retention, and 4-way stretch without the use of noisy windproof liners.