The CamelBak Maximum Gear Omega Reservoir Hydration System is a 3.0 liter/100oz hydration system designed for outdoor activities like hiking. This unisex adults' product in black color is perfect for keeping you hydrated during long hikes. The CamelBak brand is known for producing high-quality hydration packs, making this reservoir a reliable choice for those who want to stay hydrated while on the trails.