We find that as Buzz Rickson’s is made to an original spec, the brand is small compared to modern fits; therefore we advise customers to try at least a size larger than their standard size. We recommend that you contact our stores so our helpful retail teams can offer advice and give exact sizing information before you purchase. Buzz Rickson's" original long sleeve waffle T-shirt made of 10 count yarn. The loosely woven waffle fabric doesn't stick to the skin easily even when sweating and offers excellent comfort and breathability. Sewing is done with a 4-needle flat seamer that does not stress the skin, and the side hems are reinforced with bar-tack for a sturdy construction. Thermal Fabric (100% Cotton) Made in Japan Buzz Rickson's LS Thermal T-Shirt - Grey