The one star is for the straps: they aren’t positioned where you can fasten them around your legs, so they end up falling off, shifting around, and coming loose—the heavy ones... I wasn’t happy with them... what a shame

I am a runner and I got it for leg strengthening after an injury. Each "weight" includes 4 bags, i.e. 1250 grams per bag, and you can adjust the total weight by adding or removing bags. This is positive because it allows you to "play" depending on your experience or the difficulty of the exercises. The big drawback, which I notice, is that it cannot tighten around my leg so that it doesn't move during the exercises I do. Maybe if it had two "velcro straps" it would be better.

Don't buy them, they are uncomfortable, the pouches come off their place, they don't have a stable grip on the foot. In short, useless

if you turn them upside down they fall off, and you can't put them on and walk. Also, the velcro straps are not very durable, after a while they get thinner and don't really hold things together.

Pros: You can remove bags to start with reduced weight.
Cons: The strap doesn't tighten enough to keep the weight stable on the leg, but it moves like a collar... Uses are limited, meaning only lying down; otherwise, it slips off the leg

I wonder how such products are released without any control. Unacceptable product, and to return them with a courier you have to pay their value again...

You can't use them for walking, let alone for running. They are useless for the purpose I bought them.