Aqua Lung MKO Drysuit Undergarment Breathable, moisture-wicking, Bamboo blend Additional Spandex content results in extreme stretch; no need for king sizes Smooth Lycra stirrups & Elastic Thumb Loops Rear convenience flap - 2-way torso/relief zipper - Non-corroding YKK zippers Designed as a wicking base layer or a primary - layer in warm tropical waters (80F waters)