Sometimes you wish you could morph into something else. (Like when you run into the ex preshower and yell at a blind person for not watching where he’s going.) Next time, head to the new Cocoon Urban Day Spa in Rincon Hill. It’s ground zero for total transformation. The multifaceted space has espresso floors, cream walls, and exposed beams. A trickling Buddha fountain sits outside a small yoga studio where om sessions are offered all day. Settle into the loft-like mani-pedi lounge for luxurious treatments. Rejuvenate with an herbal poultice massage or the signature facial, which combines Sothys Paris skin care with ancient Indian head and foot massage therapy. In the boutique, Sally Spicer handbags, Mary Green cami sets, and super-soft gear by Yogitoes complete the metamorphosis. They’ll also be offering special wine, chocolate, and yoga workshops in collaboration with the restaurant downstairs. Just practice moderation. For a change. Cocoon Urban Day Spa, 330 First Street, between Folsom and Harrison Streets, second floor (415-777-0100 or cocoonurbandayspa.com).