Blow me shirt jdm racing shirt funny tshirts turbo racing Beware of Counterfeit sellers, Please make sure to check the seller before committing to buy There are absolutely no authorized re-sellers of Guerrilla Tees brand apparel Solid colors are 100% cotton, heather tees are a 50/50 cotton poly blend. Unsure of sizing? Our shirts are a fashion fit cut so we always recommend you order the next size up