SubmarineGear is proud to offer this USS John C. Calhoun SSBN-630 ( Silver Dolphins ) Submarine Enlisted Cap. This cap is available in 5 panel high profile, or 6 panel low profile styling. The Made in the USA caps are made of a wool/acrylic blend. The imported caps are made of cotton twill. We also offer the popular Flex-Fit style caps. All our caps are made from top quality materials. This cap would make a wonderful addition to your collection or a great gift! All our Military caps are fully guaranteed. All custom embroidery is done at our facility in Scottsboro, AL. A percentage of the sale of each SubmarineGear item is proudly forwarded to the United States Navy Licensing Department in support of the MWR (Morale, Wellness, & Recreation) program. These payments are made by either ALL4U LLC or the wholesaler from where the item originated. Our team thanks you for your service and your support of these programs.