Details, Size & Fit. Recommended for training and yoga. The Trainer Muscle Tank from The Upsideis made from soft cotton jersey with a mesh back panel for breathability. Wear yours with moisture-wicking shorts and running shoes for your next workout. Ourmodel. iswearing a size medium tank, and usually takes a size medium/40 shirt. He is6’1”(186cm)tall with a 39”(99cm)chest and a 33”(84cm)waist. Length: 78cm Relaxed fit Cotton jersey Crew neckline Mesh back panel; logo print.Machine wash cold. Low iron. fabric / material: NA.Materials: 100% Cotton.SKU: TH135SA63IFC.