Suunto Vertical 2 Watch - Black Colour:Black this system uses hollow fibre

this system uses hollow fibre filters to effectively treat even the dirtiest water

And this is because they have a long useful lifetime

which makes it ideal for setting up belays

while a technical hood and zipper draft tube prevent precious warmth from escaping

Suunto Vertical 2 Watch - Black Colour:Black this system uses hollow fibreFor adventurers who demand the best when testing their limits far from the trailhead and cell service. The Suunto Vertical 2 improves upon the original with a brighter, larger AMOLED screen, a redesigned optical heart rate sensor coupled with a flat lay backpanel for a better fit, and a built in LED flashlight that provides safety and convenience after dark; all stacked on top of the weeks on end battery life, advanced navigation tools, and tough