Aqua Lung MK2 John UndergarmentsStay warm in our Glacier line of undergarments. Designed for the coldest dives, the MK2 John gives you added insulation for your core, arms, and legs. We've designed it for versatility, so you can layer up or dial it back to suit a wide range of diving conditions. Part of our Glacier Series undergarment line. Features: Chest & Hand Pockets. Zippered chest and hand pockets provide secure storage for small items Removable Sleeves and Hood. When less