The Chill-Its 5155 Low Profile Hydration Pack provides convenient on-the-go hydration from workday to weekend. The 2-liter bladder features a wide DualCap for easy no-spill filling with water or ice. Both the pack and tube are insulated to keep water cool in the heat. The antimicrobial bite valve with cover protects against contaminants for clean all-day drinking. The lightweight and low-profile design is comfortable for wear both on and off the worksite. The pack itself is made with durable 600D water-resistant ripstop polyester for protection in rough conditions. A zippered top closure keeps the bladder secure while also preventing dirt and debris from getting into the pack. Breakaway hook-and-loop shoulder straps safely detach to prevent the pack from dangerously snagging. The water bladder can be thoroughly cleaned using the Chill-Its 5159 Hydration Pack Cleaning Kit (sold separately).