背面的卡片置放層，一般門禁卡可置放，不用 取出卡片即可通過讀卡感應。搭配伸縮扣環， 在使用上更為便利!!尼龍款和隔紋款的伸縮扣環不可拆喔!! Functional and Pratical:1 card slots,zipper pocket, keychain with telescopic rope Clear layout and compact design is made for your  easy access to coin and credit cards