The Xcel Mens Lycra Rashvest S/S is available in either white or navy, please select from the drop down menus to see if your size is available. Lightweight Lycra for total sun protection or added warmth under a wetsuit. Xcel designed product from the original yarn through to the final design in 8 ounce spandex. Delivers SPF 50+ sun protection, added warmth under a wetsuit & protection from wax rash & wetsuit rash. Features a waist elastic " Loop it or Loose it" system which can hitch at the front to your boardies to keep it tight. Sizing A rash vest, like a wetsuit needs to fit skin tight (although not be uncomfortable). Any rashie or suit will stretch slightly as it ages so a snugg initial fit is vital. The size guidelines are: Small: 37" Chest Medium: 39" Chest Large: 41" Chest XL: 43" Chest