Come and see our amazing products. Anti-fog and UV Protecting coating provide you a nice swimming experience under water.They offer you a clear and long distant view under water,and protect your eyes from being hurt by UV and bright lights.This ergonomic design makes sure that it fits closely with different facial's shapes.The backside adjustable buckle is made of silicone,can be adjusted to 14.17". Your logo can be imprinted on the silicone belt or on the outside of packing case. Pls confirm further with us if any query about packing info, inventory status and time schedule.