Pack only- no bladder The CamelBak Classic Hydration Backpack in red and gray is a versatile option for outdoor activities like hiking, cycling, or biking. Made of durable nylon, this small-sized pack features a zip closure and a single divider for organization. With a lightweight design and no bladder included, this unisex pack is perfect for staying hydrated on the go. The classic CamelBak brand, along with the insect repellent treated nylon material, ensures reliability and quality for your outdoor adventures.