I don't care THAT much about material because I can just wrap them in a condom if needed, but, jelly is iffy for me. Even though I love the fact that jelly can be super soft and squishy (same with TPR) and wrapping jelly/TPR toys isn't a big deal, storage is annoying. I hate that it seeps that oily crap, and it can't touch any other jelly toys otherwise they'll melt together, augh! They also are harder to clean, so even though I love the softness, it's a trade-off for the cheap price. Rubber, I don't think I'd buy.