5 Pair Thermo-Molding Custom Fitting Whitening Trays, By Wonder White Direct

I ordered these because the photo showed round tab trays which I have used before and they work well.However, the trays actually sent are a different brand.They have triangulat tabs and are cloudy and do not form easily to the teeth. They have a very narrow working range.If the water is not hot enough, the tray does not form to the teeth well.Placing the tray in hotter water and it is prone to wilt before you can press it around the teeth. I used to work in the dental field, so do not think it is a dexterity issue or because I am unfamiliar with dental materials.The trays are just rather difficult to use. Merchant is aware that the photo differs from the product sent; they would accept return, but this is impractical due to postage costs and low cost of item.Be aware if you purchase these trays that they are lower priced trays because they are harder to use; they are not higher quality trays that are clearer, softer, and easier to use. If you do not need 5 pair, it may still be worth it if you don't mind practicing on a pair or two before you to get a set with a satisfactory fit.