To the EF cloth menstrual pad users, what should I buy?

Flannel covers with cotton or bamboo inners are great because (like cloth diapers, which is where my knowledge comes from) the flannel wicks away the moisture and the cotton and bamboo are super absorbent. Bamboo is more absorbent than cotton, fyi.

Personally, I have a Diva Cup and it's my favorite thing EVER that I've used for a period. No more backwards shuffle off the bed, I can use it no matter how light or heavy I am. It's wonderful!

Ah, so organic cotton is not the best choice. What about fleece? Does fleece = flannel?

Fleece does not equal flannel and I would only use fleece if it's the topmost layer or the second layer because it wicks away moisture (more than flannel) but it is not absorbent and won't hold much fluid.

The top doesn't matter much, but bamboo is extremely plush and comfortable.

The backing is very important.

Types of backing:

Waterproof but unbreathable: Either PUL or another washable waterproof fabric (most waterproof things like raincoat fabric will melt, warp, crack and/or catch fire, so be sure it is something made for the washer and dryer).

Breathable: water-resistant fleece, wool, or just have enough thickness to prevent bleed-through

If it is water-resistant fleece, you want Polartec Wind Pro fleece. Unfortunately, many sellers pretend to have this when they actually have ordinary water-resistant fleece. Ordinary water-resistant fleece is not very water-resistant (usually takes two layers of it to equal one layer of Wind Pro). The problem of dishonest sellers is exacerbated by Polartec's restrictive agreements with crafters, which forbid them to mention their products are made of Polartec Wind Pro. Ask among customers to see which sellers are actually selling the real stuff (it's pretty obvious, if I throw a pad with the real stuff and a pad with the fake stuff into a full bathtub, the fake will soak up water and sink in a matter of minutes, the real will bead up water on the backing and will take maybe an hour or two to sink).

If it is wool, keep in mind that you need to wash cold and dry flat rather than in the dryer, or the backing will get smaller and smaller (benefit: it also gets more water-resistant as it shrinks). Also, thick wool pads take a few days to dry flat.

If you're not a light bleeder and you want to use the sheer number of cloth layers in the pad to prevent bleed-through, try looking into the models of pad that fold up so that you can get 8 or so layers when the pad is folded, but it unfolds for easy washing.

They're having website issues, but they took care of my order via email. I also ordered one from an Etsy seller to contrast and compare. I hope it's worth it.