Swim shirts, aka surf tees or rash guards, are great for extra sun protection or if you’re feeling a little beach body shy. Kanu Surf Men’s Rash Guard/Swim Shirt. Speedo Rash Guard Swim Tee. Vapor Apparel Performance T-Shirt. O’Neil Sun Shirt Rash Guard. Coolibar Swim Shirt. Click to see full answer. In this way, is it OK to wear a shirt in the pool?“If you’re going to be swimming, I recommend wearing a colorful skin-tight rash guard, rather than a loose T-shirt,” Parvis says. So there you have it: If you want to wear a shirt in the pool — and you care about the long-term health of your skin — wear one that’s meant to be worn in the pool.Secondly, why do people swim with shirts on? There are many reasons other than being over weight obviously (scars, sunburn, etc) but to those who do this because they are overweight, having the shirt on draws way more attention to the fact you’re overweight than if it wasn’t on. Also Know, what should I wear for swimming? Appropriate swim attire includes: A bathing suit, swim trunks, or “board shorts” Attire worn for SCUBA diving or surfing (rash guard/wet suit) Short or long sleeved shirts and/or tights and/or shorts made of synthetic material such as “Lycra” or “Spandex” What is the purpose of a swim shirt? Swim shirts They are generally more loose fitting and casually worn. Their primary purpose is to offer an alternative to sunscreen to protect the wearer’s skin from the sun’s UV radiation and possible skin cancer. Many swim shirts carry a UPF rating of 50+, which blocks out over 98% of the sun’s harmful rays.