Zipper closure.it is RFID protected for security 【Material】Genuine Leather，Fabric lining,accordion style wallets 【Dimensions】4.33"L x 2.95"W x 0.98"H,the little leather card case holds at least a dozen cards 【Multi-slots】the card wallet has 12 card slots with 2 larger spaces for bills, more cards or receipts 【RFID blocking layer】it is rfid blocking ,2 outer layers RFID blocking materials ，Be Safe and Protected from Electronic Pick Pocketing