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Measure around the waist at the belly button.
88% polyester/12% spandex 4-way stretch fabric with high-compression fit/ Self-material crew neck/ Technical cut shoulder insert/ Flat lock seam throughout entire shirt/ Double needle cover hemmed armholes/sleeve ends amp; bottoms/ DRI-GEAR' technology strongPlease see this similar product, a href"https://champrosports.com/product/2693/lightning-compression-2-0-three-quarter-sleeve-shirt"CJ07/a, if inventory on this product is low
