The GOLD CORE core warmer is designed to be worn over any jumpsuit and will help prevent water flow through the rear zipper as well as provide additional thermal protection to the core body area. We call this 2 piece suit technology FULL CORE protection. Available in 3 thicknesses for all water temperatures this suit is the ultimate for flexibility, movement and comfort. Sizes: Men's S-3XL Women's XS-XXL Colors: as shown