Ideal for longer expeditions like ultra-trails, the SOFT FLASK 500ml/17oz XA STD 42 filters bacteria and protozoa from natural water sources, so you can drink easily and safely without needing to carrying huge volumes of water. Shrinking as you drink to limit water bounce, the flask lets you know exactly how much you have left.
Volume (liters): 0.5
Weight (grams): 52
- Safe and reliable, 100% BPA & PVC free
- Eliminates 99.99% protozoa, Cryptosporidium oocysts, and bacteria.
- Meets the US FDA Standard testing protocol
- High-flow valve
- Large 42mm opening makes it easy to fill with ice or energy mixes
- TPU & RF welded seams for superior durability, abrasion resistant and elasticity
- Filter included
- Use to refill your bottles or hydration reservoir with clean water.