Opened only. [Improve Fit at Home] We deliver a DIY impression kit that fits both upper and lower teeth. You can easily adjust it at home and create a custom-shaped mouthguard. [Choose Your Thickness for Perfect Customization] You can choose from 1.0mm, 1.5mm, and 2.0mm thicknesses to adjust the fit to your liking. Experience a comfortable fit with a style that's perfect for you. [High Quality at a Low Cost] A simple ordering process with a finish by a professional workshop. It's a high-quality item with excellent cost performance. [Uses Safe German Materials] Made with reliable German materials, featuring a solid outer layer and a soft inner layer. BPA-free and latex-free, so you can use it every day with peace of mind. [Carefully Finished by a Professional Workshop] Mouthguards are carefully finished one by one in a workshop with over 20 years of experience. They are transparent for comfortable use day or night and are also discreet.