- Body suit often used by speleologists as undersuit and snowboarders, too. The exclusive LIOD 100% polypropylene fabric is breathable and warm, designed to be close tight. The zipper starts at the neck and ends at the level of the coccyx and is composed of three sliders for opening/closing and for physiological needs. Its thickness allows you to use it as a base layer on any occasion, but mainly for speleology. The high breathability allows you to always remain dry, even in places with high humidity.