I purchased a waist trainer though Fitmella and it's one of the best ones that I have tried. Does not slip and it definitely does the job needed for the results I am looking for. With proper diet, plenty of water and exercise aligned with the use of the waist trainer I was able to lose 20 pounds and 5 inches off my waist. Carmella's customer service is on point as well. She is very friendly and also makes sure she ships out her product immediately so that you are not kept waiting.