The Navy Blue shirt is 100 % cotton  the Gray shirt is 90% cotton 10 % Polyester. The Text and Dolphins are as follows Heat Pressed U.S. SUBMARINE SERVICE, Silver Dolphins, with pride runs deep underneath, or Custom embroidered Iron Men Steel Boats, Silver or Gold Dolphins, either your boats name or your name and rate. The embroidered Dolphins and text on the front is extra. Shirts with pockets and Shirts sizes  2 XL, and 3XL are extra.  Please List in the special Instructions box If you choose embroidered Dolphins and text on the front what you want under the dolphins on the front ie Boats Name hull number or your name and rate.