It's difficult to say which waist trainers work best, as there are many different brands and types available on the market. In general, the effectiveness of a waist trainer will depend on factors such as the materials used, the construction, and the fit.
One way to determine the quality of a waist trainer is to look for reviews and ratings from other customers. This can give you an idea of the experiences others have had with the waist trainer and whether it has been effective for them.
Another important factor to consider is the materials used in the waist trainer. Waist trainers made from high-quality, breathable materials are likely to be more comfortable and effective than those made from lower-quality materials.
Ultimately, the best waist trainer for you will depend on your individual needs and preferences. It's important to do your research and consider factors such as materials, construction, and customer reviews in order to find a waist trainer that is likely to be effective for you.