PROOF is a veteran-owned brand specializing in minimalist wallets that combine slim, practical design with premium materials. Its wallets pair aerospace-grade aluminum with choices such as top-grain or full-grain leather, carbon fiber, and ballistic nylon. Built-in RFID-blocking materials help protect cards, while a front pull tab makes them easy to access and a rear cash strap keeps bills secure. Depending on the model and card load, PROOF wallets can hold up to 25 cards and cash, yet are designed to remain compact and lightweight.

The brand also offers custom laser engraving and wallet upgrades, along with products including Vanguard pens and key holders. PROOF emphasizes customer service through a 100-day, no-questions-asked refund and return period and a lifetime guarantee that covers wallet issues, including replacement if a wallet is damaged or lost. Orders typically ship within one business day. Customers can shop wallet collections and deals, locate stores, and contact the support team for assistance.