Fine rib knit, closely fitted through the body with a gathered shoulder seam that adds a little volume right at the cap before the sleeve narrows down the arm. Hand wash cold or machine wash gently inside a bag, and lay flat to dry so the fitted rib doesn't stretch out of shape. Avoid high heat, which relaxes the rib's natural stretch and recovery, and reshape the shoulder gathers by hand while the knit is still damp so they don't dry flat. With gentle care, the fine rib keeps its close fit and the shoulder detail keeps its shape wash after wash.