Summit Short Sleeve Pullover Summit is made with a new version of Zamza Light, a premium fabric. It is the lightest, windproof knit fabric available. This ultralight, highly water-resistant fabric with incredible 4-way stretch makes the Summit Sun Mountain's top wind piece. Features: Fabric is feather-light, highly water-resistant, and windproof Considerable 4-way stretch allows you to move freely Stand-up, zip-through collar Hidden chest pocket Deep chest zipper for easy on and off