The Tamrac Large Lens Case Belt features a storm-tight zipper and padded design to protect your lens. Made with durable 9000 PolyTek material, this black lens bag is compatible with Tamrac's Modular Accessory System (MAS) and is designed specifically for Tamrac lenses. The Tamrac MX5378 model is designed to fit Tamrac MAS compatible lenses, making it a practical and secure storage solution for photographers on the go.