Kids' Carhartt National Parks Backpack Graphic Long Sleeve T-Shirt 15603-CA6624 Like hiking through a national park, only lighter. This boys' long-sleeve graphic T-shirt has some fun with a backpack-inspired print. Built Carhartt tough from durable, machine-washable cotton jersey fabric, kids will grow out of it before they wear it out. Kids' Carhartt National Parks Backpack Graphic Long Sleeve T-Shirt