OThree Rash VestUnless youve bought your wet semi dry suit from a bargain basement outlet, gone are the days of needing a Rash Vest to protect against dubious neoprene, aggressive seams and itchy linings. OThrees long sleeved Rash Vest will shield you from all of the above and because of the quality of fabric, if worn on its own, this vest offers additional UV UPF50 protection and a practically impenetrable barrier against jellyfish stings. UV and Sting Protection