There are quite a lot of voices online saying that zip up binders are really bad. Apparently they're less stretchy by design (since you dont have to wriggle your way in) and are hence much more restrictive and have less room for adjustment. So if it's even slightly too small it can be harmful.

At the same time, zip up binders get recommended for hEDS and mobility issues all the time, or for sensory issues. Also brands that are considered trustworthy sell zip up ones.

Is there any trustworthy information on this? How dangerous are they?

I would really love to get a zip up binder, both for mobility and sensory reasons. The prospect of just being able to take small breaks by zipping half or all of it during the day is really appealing to me.

I psychologically and physically can't handle bras and have only ever managed with a front zip up bra