Hydrapak Soft Flask Review

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In a world where weight and packsize is becoming everyone’s current obsession, reviewing every item you carry and evaluating its necessity has become the norm. These days I use a 27 l Dorsa pack for 6 day hut to hut touring where 15 years ago it would have been 35 l. For years the near unbreakable nalgene was the go to water carrier but a rigid litre bottle does take up a lot of space in your bag. While bladders with hoses have their place, their use in the Alpine environment often lets you down as fluids freeze in the hose and they become frustratingly unusable. Enter the soft flasks into the marketplace.

The concept is simple, make a flask robust, flexible and compressible and once its empty it takes up very little room. Ideal for packs or even if you head out for a run with one in your hand that can then be stuffed in a pocket once its empty. I’ve used these for all sorts of stuff from alpinism, guides tests, hard multipitch rock, cycle tours, skiing and running and even on expedition on Baffin Island. They are pretty robust and in all that time Ive only punctured one, and in the same period the rough treatment my kit gets has caused two nalgenes to crack.

Hydrapak also make these flasks under the Salomon brand name but one of the features I love about the Hydrapak own brand ones is a lockable nozzle. If  you are like me and avoid surgery gels, take your on hill booster in the form of expresso macchiato in a 150 ml flask and avoid milk leaking in your pack and going off. If you are a gel person then a few gels can be decanted into a 150 ml flask and you avoid the mess of empty gel packaging and that oozing sticky mess in your pockets.  I also use a 250 ml if I’m only out for an hour or two and have a couple at 500 ml and a 1 l flask to cover all types of adventure. One minor downside is they are only rated for 60C so if you like your drinks really hot then you’ll have to take a thermos which will keep them warm longer anyway. I’m not too fussed by hot drinks on the hill and often mix the Marche tea from the refuges with some cold water just so I have a caffeinated drink with me. These are truly brilliant pieces of kit and a must have.

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