Navy Seals t-shirt featuring a subdued design. Great Navy Seal shirt for active duty Seals, Navy Seal Veterans and fans of the U.S. Navy Seals. This super-soft, baby-knit t-shirt looks great on both men and women. It is an updated unisex tee, which fits like a well-loved favorite. Made from 100% cotton, except for heather colors, which contain polyester.