Each end of this sculpted toy is separately crafted: use it on its own or wear it in a harness and one end curves perfectly to fit you while the other stands poised for fumble-free penetration. Marbled black/white silicon. Mini Nexus, a slightly smaller model, blue/white marbled silicon. Use lots of water-based lube for maximum pleasure (remembering never to use silicone-based lube on a silicone toy). Easy cleaning with anti-bacterial soap or sterilization in boiling water for 1-2 minutes.