The mountain CFEA Slate Edition II from PolarPro will thoroughly protect your memory cards from moisture and damage. This case has a sturdy aluminum enclosure and a card storage tray made from thermoplastic elastomer. It also has a waterproof gasket seal made from silicone to keep water out, giving you peace of mind if traveling with the case or using it as storage. This case holds four CFexpress B cards, four SD cards, and eight microSD cards.