Gore Bike Wear understands that the demands of proper temperature regulation for cold weather cycling aren't all that different from many other aerobic high-altitude pursuits, like ski touring or snowshoeing. Thus, Gore's new ALP-X AS Insulated Vest follows the principles of an intelligent layering system, while taking a few design cues from hardy backcountry outerwear. The ALP-X AS Insulated Vest is built around Gore's superlative WindStopper fabric, which blocks out wind's most valiant attempts to chill your core. Beneath the membrane, Gore lined the vest with Primaloft synthetic insulation for impressive warmth retention whether you choose to use the vest as a mid-layer for cold rides, or on its own atop a long-sleeve jersey. The beauty of both the Windstopper membrane and Primaloft is that while they are both exceptionally packable on their own, together, you get a vest that easily stuffs down to a jersey pocket once your ride finally dips below the thermocline.Gore provided two front zippered hand pockets, and two side mesh pockets ? the latter of which provide easy accessibility if you're wearing a pack. Reflective piping and logos on both the front and back of the jacket help keep you visible if you're out after dusk. The ALP-X AS Insulated Vest is available in Castle Grey/Black, Navy Blue/Black, and Red/Black, and in sizes Small through XX-Large. It follows Gore's 'Slim' fit delineation, which is an ergonomic profile that leaves you room for lightweight layering.