Rab microlight vest the microlight vest is a light weight weather resistant down vest designed to provide core warmth for a range of fast and light activities and day to day use a mini stitch through baffle construction and a minimal uncluttered design make the microlight vest ideal for use as a layering piece for alpine climbers or an adaptable stand alone vest for day to day use 110g large of 750fp hydrophobic down provides excellent warmth without compromising on weight and is pr