You’re not wrong, but they call it Super instead of Heavy for some reason. You can get L, R, S, and S+ tampons.

At my worst I was flowing over a S+ in under an hour, but that’s not okay and I’ve got health problems that are causing it. They’re supposed to last around four hours, and you can’t leave them in for more than eight hours or you run infection risks. They can be painful coming out dry, so if you’ve got a lighter flow, you’ll want a lower absorbancy so they’re nice and juicy coming out.