OMGear sun protection suit is made by 230g poly Lycra, which consists of 88% polyester and 12% spandex. Material of OMGear rash guard is also breathable and quick-dry, makes you sweat less and keep your body comfortable even under strong sunlight! 230g poly Lycra has better function and more durable than most rash guards made by 190g poly Lycra. OMGear Lycra sun protection tee contains 12% spandex which is different from most Lycra sun protection tee contains 7% spandex. Spandex is a softy and stretchy material, so higher percent composition of Spandex means more flexible and elastic, offering more comfortable. Instead of normal single-needle flat sewing, we use four needles six lines sewing, which is stronger and more durable. For stretchy rash guard, four needles six lines sewing is the key to ensure the rash guard won't be tearing apart after long-time using. According to statistical dates, lifetime of rash guards made by four needles six lines sewing is much longer than single-needle flat sewing. OMGear rash guard is with sun-resistant coating which can protect you from UVA and UVB rays, so please wear rash guard when there is strong sunlight! OMGear rash guards are perfect for hiking, climbing, running, snorkeling, swimming, surfing, scuba diving, kayaking, paddling, rafting, boating, sailing, beach walking, nearly all outdoors activities, even can be used as a cool T-shirt OMGear team provides a waterproof phone case together with each rash guard. Quality 100% waterproof phone case, but please do tissue before using.