Patagonia Micro Swell Rashguard Jurassic Ferns Size Medium For comfort and protection in the water, this stretchy and fast-drying rashguard has 50+ UPF sun protection, long sleeves and a higher neck. Printed fabrics are 83% recycled polyester/17% spandex; solids are 83% recycled nylon/17% spandex. Fair Trade Certified™ sewn.