It is a Salt Thing T-Shirt

Salt Classic Guys / Unisex Tee

This heavy cotton t-shirt is made of durable, 5.3 oz, pre-shrunk, 100% cotton material and is perfect for a graphic print. This best-selling, classic fit is ideal for men and women who prefer a little more room in their shirt.
Due to product availability, cotton type may vary for 2XL, and 3XL sizes.
Dark Heather is 50/50 cotton/polyester
Sport Grey is 90/10 cotton/polyester
Double-needle stitched neckline, bottom hem and sleeves
Quarter-turned
Seven-eighths inch seamless collar
Shoulder-to-shoulder taping