These beads are made out of silicone, which is a great, smooth, and safe material for sex toys. The only downfall about them being silicone is not being able to use my favorite anal lube, which is oil-based; ALWAYS use water-based lube with silicone. When I first opened these beads, they had no smell, and even after several uses, they still have no smell. The texture on the bumpy set is amazing: not too subtle and not too intense. Due to them being silicone, the string between each bead is flexible, which makes it difficult to insert, but once inserted is very comfortable.