HydraPak Ultraflask 500ml + Filter Kit

Complete flask + filter system for safe water anywhere.

• Hollow‑fibre filter removes 99.99% of bacteria and protozoa.
• UltraFlask™ fits perfectly in running vest pockets.
• Soft flask collapses as you drink — no sloshing, no wasted space.
• High‑flow bite valve for smooth, efficient drinking.
• Lightweight, packable, and ideal for long trail missions.

UltraFlask™ 500ml

• Capacity: 500 ml
• Material: Ultra‑durable TPU (BPA‑free / PVC‑free)
• Valve: High‑flow bite valve
• Design:
  - Soft, collapsible body
  - Shrinks as you drink
  - Fits most running vest front pockets
• Weight: Approx. 54 g (flask only)
• Maintenance: Reversible for easy cleaning; top‑rack dishwasher safe

42mm Filter

• Filtration: Hollow‑fibre membrane
• Removes:
  - 99.99% of bacteria (e.g., E. coli)
  - 99.99% of protozoa (e.g., Giardia, Cryptosporidium)
• Flow rate: Fast‑flow squeeze‑compatible design
• Lifespan: Up to 1,500 litres
• Thread size: 42mm
• Weight: Approx. 57 g
• Use: Drink directly through the filter or squeeze into another container
• Maintenance: Backflush to restore flow

• Long trail missions with natural water sources
• Mountain runs, fast‑packing, and multi‑day adventures
• Runners who want filtration without pumps or tablets
• Race days where weight and simplicity matter
• Pairing with running vests and belts

This kit is one of the most versatile hydration solutions for New Zealand runners. The UltraFlask™ is lightweight, comfortable, and vest‑friendly, while the 42mm filter adds confidence when refilling from streams or alpine water sources. Together, they create a simple, reliable system that keeps you moving fast without compromising safety or convenience.