4.3 oz., Premium Cotton Blend, 30/1's fine knit jersey Soft and lightweight Printed with 100% eco-friendly waterbased ink for a soft feel - no cracking or peeling. This Roots of Fight style shirt is a tribute to martial arts legend Joe Rogan. This is printed on a heather gray shirt. All of our shirts are printed on premium cotton tees. Unlike most other t-shirt sellers on Amazon, we never take a shortcut on the quality of our shirts.