CND Solar Oil, $11, cnd.com for salons
Hangnails and chips, meet your nemesis. Massaging a nourishing oil into cuticles nightly keeps them hydrated and looking pristine, while adding a layer over dry polish creates a flexible, high-sheen seal that resists scuffs, says N.Y.C. manicurist Patricia Yankee. Or try buffing your nails and applying this solo for a healthy bare look.