Diesel T Nightmare Shirt 100% Cotton Machine wash warm, only non chlorine bleach when needed. Tumble dry low, cool iron if needed. Wash dark colors separately. 100% Cotton Machine wash warm, only non chlorine bleach when needed. Tumble dry low, cool iron if needed. Wash dark colors separately. Small Chest: 34-36", Medium Chest: 37-38", Large Chest: 38-40", Extra Large Chest: 40-42"