Fine rib knit with a close, second-skin stretch that follows the body rather than skimming over it — the lettuce-edge trim is knit with extra stitches so it curls naturally and needs no separate finishing. Hand wash cold or use a gentle machine cycle in a wash bag, and reshape the neckline while damp so the ripple in the trim doesn't pull flat. Avoid high heat when drying, which can relax the rib's stretch and leave the fit looser than it should be, and store it folded rather than on a hanger to stop the fitted shoulders from stretching out of line. Handled gently, the fine rib keeps its close, second-skin recovery wear after wear.