Made in Japan Mouth Guard for Kendo - L Size - Set of 2 Suitable for adult men (14-bar face guards) Can also be used for Jukendo and Naginata face guards 1mm thick for a sturdy construction Made of polycarbonate, which is resistant to impact and cracking As a martial arts equipment specialist, after various tests and monitoring, we found that thin 0.5mm or 0.3mm mouth guards tend to come off the face guard due to the impact of strikes, or are more likely to break during removal (thickness is important. Please check the thickness when purchasing). This product was created after determining that 1mm thick polycarbonate is the most suitable material for mouth guards. Please remove the blue vinyl before use. Please comment if you wish to purchase multiple sets. We have plenty of stock, so immediate purchase is welcome. Combinations of adult and youth sizes are also acceptable (1 L size, 1 M size). Please specify your preference after purchase. Shipping will be via standard mail, so it will take approximately 3-5 days for delivery. Furthermore, standard mail does not deliver on weekends and holidays, so delivery will be further delayed if weekends or holidays are involved. Thank you for your understanding. If you require faster delivery, we can change the shipping method for an additional fee, so please comment before purchasing. No price reduction.