We don't think anything quite pulls off a midweight performance fleece like the Burton AK Helium Grid Half-Zip Fleece. Designed for active or casual winter pursuits, this no-frills pullover features a matrix of grid and hard fleece to create warmth where you need it and breathability where you want it; the minimalist design reduces mass and maximizes overall performance. Plus, with nifty features like stretch thumbloops and a bicep pocket, this fleece goes above and beyond for whatever the day holds.