Hydrapak Ultraflask 500ml + Filter natural fibre The wide 42 mm cap

The wide 42 mm cap with twist-locking system makes refilling easier and eliminates spillages

It’s also craft-stitched onto the midsole

and small essentials

Friction-free yarn combined with proprietary Drynamix yarn minimizes the risk of chafing and rub spots

Hydrapak Ultraflask 500ml + Filter natural fibre The wide 42 mm capDescription The UltraFlask 500ml + Filter Kit is a compact and efficient solution for safe hydration; designed to provide clean water on the move. With a flexible and compressible design; it fits securely in hydration packs and vest pockets; ensuring stability and comfort while reducing bulk as you drink. The 42mm wide opening allows for easy filling at water sources; and the bite valve delivers smooth; drip free sips with every drink. The secure grip