USS Yorktown CVS-10 Embroidered Baseball Cap - Navy Blue 100% Cotton Twill Cap Color: Navy Blue 100% Cotton Twill Fabric Profile: 3" Mid-Crown, Six Panel Construction Structure: Constructed, Soft Fused Buckram Backing, Back Strap: Fabric-Covered Velcro Closure "S" in CVS was added in 1957 to reflect the primary role of Submarine Tracking Pre-curved Bill with Matching Undervisor