J. Crew Structured Muscle T-Shirt In Stripe Mariner Cotton New With Tag Small Factory Mistake Color Mark On Front. See Pictures. Elevate Your Tee Collection. - We Took Our Customer-Favorite Mariner Cotton (A Lightweight-But-Durable Fabric That Feels Like Your Favorite Rugby) And Dressed It Up With Shoulder Pad Details For A More Defined Look. After All, We're All About Options. By Buying Cotton Products From J.Crew, You're Supporting Our Investment In Better Cotton's Mission To Help Cotton...