Outdoor Products Grey Gray Knox Hydration Pack features a 7.5-liter storage capacity and includes a 2-liter (67oz) BPA-free reservoir. Designed for hikers and cyclists, it boasts a breathable mesh back panel and shoulder straps for maximum airflow. The grey exterior is accented with a subtle topographic map pattern and includes a front compression system to secure extra gear. A dedicated hose port and shut-off valve on the bite valve ensure easy access to water while on the move. Built for durability, this lightweight pack is ideal for day trips and outdoor adventures.