"Store your student cards/transit cards with this Ditto Badge Card Holder! ◆ Made of high-quality ABS materials, our badge holders are durable, lightweight, and waterproof. Protect your cards from dust, scratches, and damage. ◆Can hold up to 2 credit card sized cards, such as ID cards, transit cards or business cards. ◆Comes with a short lanyard keychain, so you can bring it along wherever you go. How to open the card holder: Before opening the card holder, detach the keychain. Then, flip to the side with the complete printed design and slide it upwards. Note: The card holder can store up to 2 cards, but some transit/key cards may not work well together. If that happens, please put only 1 card."