You're looking at a card case that is made from leather and comes in brown. It's a very minimalistic model with just a credit card slot.
From Amazon
Ledlenser Premium Accessories - Lite Wallet, Rechargeable RFID Wallet for Men, Leather Card Wallet, Power Bank, LED Torch 150 Lumens (12 Hours Running Time) RFID Blocking Card Holder (Vintage Brown)
Trekkinn
Led Lenser Leather Wallet With Lantern 150 Lumens Brown