This is the Aqua Lung MK2 Jacket Drysuit Undergarment Dry Suit Layer Features: Removable sleeves 2 zippered vertical chest pockets 2 large fleece-lined hand warming pockets Thumb loops StormShield face guard with fleece liner Zip-off Storm Hood with adjustable ladder locks and stretch cords Materials: Breathable, moisture wicking, high loft, insulating polypropylene Polar Fleece lining. StormProof 70 denier micro-ripstop water resistant Taslon nylon. The Aqua Lung MK2 Undergarment Jacket is the core of the Glacier series undergarments. extremely versatile, these garments can be layered up or down to match the widest range of diving conditions. Stylish and feature rich, the MK2 undergarment jacket coverts to a vest to be worn as added thermal protection with the MK2 john. "