Nike Swim Men's Short Sleeve Hydroguard Rash Guard. Size Medium. Color Midnight Navy. New with tags. Dri-FIT™ technology wicks perspiration away from the body and towards the surface where it can evaporate. UV Protection UPF 40+ safeguards the covered skin from the sun's harmful rays. Crew neck. Short raglan sleeves. Swoosh™ logo at left chest. Straight hem. 100% polyester.