I have find, below the shoulder, wavy/curly hair, which frizzes a lot when air dried. When I do wear my natural curls, bonnets or scarves work great to keep it from tangling while sleeping. However if I let my hair air dry or straighten it, the bonnets and scarves allow too much room and my hair moves too much in it. I wake up looking like I had a very rough night lol.However, these are perfect for my hair when I don’t do it curly (I haven’t tried it yet with the curls but I will eventually). They are lightweight so I don’t get overly hot while sleeping, no ties or huge band getting in the way. I ordered a medium since my hair is fine, but it is long, so I wrap my hair up (as if you were putting it in a low bun), slide this cap over without tying it up,and let it do whatever it wants to. and I even have a slight curl on the ends the next morning.Others have mentioned about the adjuster clasp being in the way and it kind of is. I took off a star for that, but overall it’s really not that bad. I put it on so that piece falls a little behind my ear, and tuck it in if it’s bothering me. Sometimes I only tuck in the strap and leave that piece on the outside.I’ve only had them for a week, and have worn them to sleep every night. I’m very pleased with them. $10 for 2 of these bad boys, you can’t go wrong, even with the clasp. I’d still buy them again. They’re functional for me and my hair type/texture.If you’re on the fence, just try them. If you’ve never used a bonnet, scarf or anything similar, and want to, try these because they’re reasonably priced. If you love them as much as I do and the adjustor clasp is really bothersome to you, then you know you like it and can upgrade to something different. But I personally think they really are great!