The Cin2 Core Long Sleeve Crew Neck T-Shirt 4115 is part of Cin2's Core collection which is built around offering a better basic. Clean, simple design with refined fabrics and construction. Cin2's Core Long Sleeve Crew Neck T-Shirt 4115 is made of pure, 100% Pima Cotton for a rich, soft feel and lighter weight than your average cotton crewneck.