The SoftFlask Speed is engineered for seamless compatibility with virtually any vest or pack on the market. Its pinch-welded bottom slides effortlessly into pockets, while the innovative SpeedFill™ flip top enables one-handed filling for both water and fuels. The self-sealing silicone bite valve delivers controlled sips without spills. At just grams, this 500ml flask combines ultralight performance with practical durability—perfect as a replacement or upgrade for your hydration setup.