10 Pack Assortment: Comes as a pack of 10 transparent retainer cases Ventilation Design: Our aligner case is meticulously designed with 16 ventilation holes, 8 each on the top and bottom, make proper air circulation to keep your dental retainers fresh and hygienic Compact and Portable: Each denture case measures 3.4*3.19*1.14inch. Carry it with ease in your pocket or purse, making it ideal for travel and daily use Food-Grade PP Material: Our mouthguard cases are made from food-grade PP material, safety and hygiene. These cases are sturdy, drop-proof, and built to last, guarding your dental retainers effectively Widely used: These retainer holder case can be used for aligner, mouthguard, denture storage 10 Pack Retainer Case,Dental Retainer Box with Vent Holes