I am petite and about 115 lbs. I couldn’t afford one of the adjustable weights one, I bought this 12 lb one and like it. I bought a different brand pink one to start with and don’t like it as much— unsure why.
I don’t really know what the science has to say about it but I do find it helpful. However, I had to be very actively thinking about proper posture (keeping my core engaged, using my glutes) while using the vest because it was too easy to rely too much on my back and knees, leading to pain.
https://a.co/d/dC73j2Z