The Chill-Its 5155 Low-Profile Hydration Pack provides convenient on-the-go hydration from workday to weekend. The 2.0L (2000mL) 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.