The pedicure chairs at Cachet Nail Boutique look more like thrones, their high backs swathed in tufted, pearlescent white leather and cushioned by a matching fur pillow. The luxurious touches don't end there, as the shop's tubs are outfitted with filters that ionize the water, and the mani-pedis themselves integrate indulgent products like souffle-coconut masks and scented massage oils. Nail services aren't the only ones performed here, though, as the on-site spa houses aestheticians who cleanse skin with vitamin-C facials and add drama to eyes with mink lash extensions.