From Bruno Fazzolari's Fzotic brand, Opoponax bar soap: "Bruno Fazzolari created a rare soap using a limited quantity of genuine opoponax resin that they acquired. The soap has a rich, earthy fragrance balanced with sweet tonka bean and fresh cypress. Opoponax resin has been traditionally used in skincare and incense and is known for its calming properties. The soap includes their proprietary blend of botanical oils and clay, such as shea butter and apricot kernel oil, leaving your skin soft and delicately moisturized. This huge shower bar weighs in at nearly half a pound. " $18 for 200g at Smallflower.