Jack and Jones Core Costan Overshirt Mens. Jack & Jones Core Costan Overshirt MensStay on trend this season with the Jack & Jones Core Costan Overshirt. Its lightweight construction features a fold over collar, long sleeves and a full length zip fastening for a secure fit. Crafted with two pockets to the front for any essentials, this piece is finished with Jack & Jones branding.• Men's Overshirt• Lightweight• Fold Over Collar• Long Sleeves• Full Length Zip Fastening• Two Front Pockets• Jack & Jones Branding• Shell : 52% Polyester, 48% Nylon• Lining : 100% Polyester• Machine Washable• Keep Away From Fire