Gregory Alpaca 25L Gear Box Mirage Tan One Size. Specifications for Gregory Alpaca 25L Gear Box: Manufacturer: Gregory Pack Volume: 25 liters Size: One Size Features of Gregory Alpaca 25L Gear Box IP65 - Sealed gasket design keeps gear dry and dust free rain or shine. Unique latch system that doubles as a hinge allowing the lid to be fully removed or accessed from either side. See-through high-impact lid to quickly locate gear and keep it protected. Package Contents: Gregory Alpaca 25L Gear Box Gregory 157817-A269: Alpaca 25L Gear Box Mirage Tan One Size