West Coast fashion brands like James Perse, Poleci, and Margaret O’Leary have successfully migrated east in recent years. Now it’s beauty’s turn, as the L.A.-based spa Lather arrives in midtown (127 E. 57th St., nr. Park Ave.; 212-644-4449). Alongside the sweet-smelling plant- and food-based bath and skin products, there are signature treatments like the Chocolate Pedicure ($60) and the exfoliating Bamboo Indulgence ($85). While you’re there, check out the lounge featuring rotating art exhibits and the 200-square-foot wall made completely of plants and flowers.