Crackstuffers Large Rough Rider. For extra pleasure and a bit of rough play, those bumps will deliver. Nice to play with when youve been playing for a while. This being the biggest in a set of three, its a good feeling on your hole as each bump goes in. Crackstuffers toys are made in a new improved Phthalate free vinyl. They are softer and stronger than before and smell good too. Always use plenty of lube, and they are safe to use with water based lubes, silicone and oil based lubes.