White/Black, White/Red, White/Royal, White/Navy: These solid coloured shirts are made of 100% cotton and will shrink. We recommend washing in cold water and hanging to dry, or tumble drying on low heat. 

Grey/Charcoal Heather, Grey/Navy Heather, Grey/Cardinal Heather: These heather coloured shirts are made up of cotton/viscose and cotton/poly blends which reduce shrinking, even in high heat. However they will still shrink a minimal amount.