Personalized Stay Cool Long Sleeve T-Shirt. Swim, stay cool in the pool in wavy text is a unique design for swimmers at back to school, birthdays and holidays. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL