I was really looking forward to trying TESLANG for my fitness requirements, but unfortunately, I ended up having a very negative experience with it. Unfortunately, the quality of their merchandise does not live up to the standard set by their website. Although each of the dumbbells I purchased was supposed to weigh 20 pounds, I found that they were significantly lighter than that. The weight plates were also not correctly secured, which resulted in them rattling around while they were being used. It appeared as though the resistance bands were going to break at any minute due to their frailty. To add salt to the wound, when I attempted to resolve these issues with their customer service, I received no assistance and no response. In general, I do not recommend TESLANG for people who are very serious about working out. There are other choices available that are of higher quality for workout clothes.