Our hydration systems let you take in liquids without breaking stride. The HydraPakA(R) Streamer II 1.5 L is specially designed for our running or bike vests and smaller backpacks. Its wide opening makes it quick to refill and is sealed with an ergonomic slide-clip system. The HydraPakA(R) Streamer II 1.5 L is fully reversible for easy cleaning. This lightweight system is compatible with our 28 mm filter and is BPA free and made without intentionally added PFAS. TPU (Thermoplastic Polyurethane: Flexible, durable plastic material that is abrasion-resistant and taste-neutral. ABS Acrylonitrile Butadiene Styrene - strong, rigid plastic with high impact resistance. SI Silicone - soft, temperature-resistant material, hygienic and long-lasting. POM Polyoxymethylene - high-strength, low-friction plastic for precise components. EPDM Ethylene Propylene Diene Rubber - elastic sealing material, resistant to weather and UV. ST Steel - robust metal with high stability and durability.