by davidmorr » Sat 09 Apr, 2011 2:54 pm
I'm always amused by the idea of Goretex or other "breathable" materials being used to line a boot or shoe. There seems to be the idea that the boot will breathe and reduce moisture levels inside the boot.
Firstly, Goretex relies on having air both sides of the membrane so that the moisture vapour on one side can be pulled through to the lower humidity area on the other side. In a boot, outside the Goretex is usually leather which will hardly allow moisture through it at any useful rate.
Secondly, to be effective for moisture transmission, it must be kept clean. The tiny pores are easily clogged by dust and dirt. Having seen my feet after a day in the bush, a boot is going to be just about the dirtiest place imaginable.
Thirdly, Goretex is not really an elastic material. The stretches and twists the boot endures are enough to strain the stitching and tear the Goretex. I have had it happen on several pairs of shoes within a trip or two of starting to wear them.
On this basis, why pay for high tech materials when a simple waterproof membrane would do the same job at a fraction of the cost. (The Goretex lining adds $50-$100 to the cost of a pair of boots.)
As for the inside drying quicker, take a couple of big freezer bags. Dry your feet, put on new socks, put your feet into the plastic bags and put your boots on. Works brilliantly. (I was a sceptic at first, but having tried it.....)
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