Comes in XS to 3XL. It is made using HyperKewl fabric with a water repellent nylon inner to keep you dry and a nylon and mesh outer. Simply soak the vest for 2-3 minutes, squeeze out the excess water, and put the vest on. Keeps you cool for 5-10 hours. Go to www.youtube.com and search on HyprKewl to view user feeback.
