Bought this next size up for son and he had grown 2 sizes. He wore the gray ones once around the house, they were laundered and hanged to dry. smoke-free home. Breathe ON in a light, ultra-soft, breathable stretch knit that feels great for all kinds of moves. Elasticized waist, with interior adjustable drawstring. On-seam welt pockets at hips. Go-Dry moisture-wicking technology keeps him dry & comfortable. Ultra-soft, breathable lightweight jersey lets him vent. Engineered with innovative Built-In Flex stretch technology. Equal parts comfort & movement. Flexin' on 'em. Tag-free label inside back waist for added comfort. #646407