Get 15% OFF Your Purchase Today! Use Coupon Code 'GET15' Tip for easily slipping full body swimsuit on and off: make sure your skin and the suit are both dry. Not all fabric is equal. When choosing sun protection clothing, make sure the UPF ratings offer the maximum UV protection. The UPF rating give information on how much sun ultraviolet rays pass through dry material. Any swimwear material above UPF 15 offers good protection against UV radiation, however, UPF50+ is the highest ratings which blocks over 97.5% of the sun UVA and UVB radiation.