Foil Armor is a trading card preservation brand focused on managing humidity to help keep cards flat and protect them from curling, warping, and other moisture-related damage. Its patented two-way humidity control packs are designed to maintain 65% relative humidity by absorbing or releasing moisture, unlike desiccants that only remove it. Made with glycerin and water, the packs are described as non-toxic and suitable for foil, holographic, and other trading cards.

Foil Armor products are intended both to relax curled foil cards and to support long-term storage in sealed containers. The brand offers packs in 8-gram and 33-gram sizes, along with an XL option, in multipacks and retail displays. An 8-gram pack can treat up to five cards at a time, while a 33-gram pack can treat up to ten; treatment typically takes 24 to 72 hours depending on pack size. For ongoing storage, the packs regulate humidity, and an indicator card signals when replacement is needed. Foil Armor sells directly online and provides wholesale information.