Ashley StAngelo hi Ashley,
Plastic pants are basically underwear made of either rubber, plastic, PVC or vinyl. Since you say you are a heavy leaker, I'd suggest prevail overnight with plastic pants over them to keep them from leaking. You can try 2-3 regular underwear and plastic pants and see if that works for you. After all these years I've been using plastic pants, even on days I don't leak, I have become used to using them as regular underwear as well. It just became the norm for me I guess. I find them quite comfortable on cool days as they hold in the heat keeping that area warm on colder days. On hot days they can become too sweaty after an hour in them. I have tried the plastic pants from here and they were excessively stiff. I prefer from alltogetherenterprises based out of Utah or the bikini style from Haian out of China. Another company that is good is Rearz based out of Canada, they even have some with designs on them to make wearing plastic pants a little more bearable. Alltogetherenterprises and Haian brands can be found on Amazon fairly reasonably priced and some of the Rearz brand. I hope I helped you figure out an idea what step to take next in comfort wearing plastic pants. Feel free to let me know what works for you if you'd like.