I'm no fabric connoisseur, but the shirts i received are light weight and feel very comfortable. Very breathable fabric, which i need in California. The shipping, as other reviews state, is god awful. Way over-charge you for shipping (i work for an ecommerce site myself that ships products, i know shipping rates) and it is the slowest possible shipping on every option. This is a huge downfall and probably the only reason Busted Tees isn't going to be my first choice or even my second for future shirt purchases despite how great their products are. In 2017, shipping should cost near nothing.