DescriptionAll adult tees are 100% Cotton but Grey tees are 90% Cotton & 10% PolyesterFabric Weight Is 185gsmSize Guide: Loose Baggy Crew Neck T-ShirtS 34/36″ M 38/40″ L 42/44″ XL 46/48″ 2XL 50/52″ Erin Go Bragh (Multi Colour T-Shirt)