Source: https://www.amazon.com/Pacsafe-RFIDsafe-Anti-Theft-RFID-Blocking-Compact/dp/B00MOF59S2/ref=pd_d0_recs_v2_cwb_198_6?_encoding=UTF8&pd_rd_i=B00MOF59S2&pd_rd_r=T8Y92JKQRS8JGCAJEZV2&pd_rd_w=sziaT&pd_rd_wg=iMwO0&refRID=T8Y92JKQRS8JGCAJEZV2