Swim shirts are relatively new to the consumer market, but are growing in popularity. Like rash guards, they have anti-chafing seams and protection against the sun's UV rays and possible
skin cancer, but they are generally more comfortable and casually worn like
T-shirts. Thus, they serve as a simple alternative to sunscreen, which may not be used properly or trigger skin allergies or sensitivities. Many swim shirts carry a
UPF rating of 50+, blocking over 98% of the sun's harmful rays. Even though the name generally applies to water sports, people use swim shirts for an array of activities: swimming,
boating,
golfing,
tennis,
gardening, playing in the sprinklers,
water parks, beach trips, pool play, rivers and lakes,
water skiing, surfing,
snow skiing,
sledding,
skimboarding, in mixed martial arts and Brazilian jiu-jitsu, and even as normal everyday clothing. == Rash guards for grappling / mixed martial arts ==