The animal skin merciful of situation is substantially more well-appointed and flexible, specially at demean altitudes. There are mercantile sealing confounds. There should be at slightest two layers of filling involving the boots and your feet. You may ponder use a man-made hosiery for carrying wetness distant from my feet and a man-made/wool blend for the outside hose for heat and cushioning. You may deprivation to add different sock the satellite shroud for new high temperature. It is advisable every figure of waterproofing but I don't reckon plastic boots are called for at 6000 meters.
People have been walking in animal skin place on the snowfall. The lone safekeeping and robustness considerations would be if the boots are tight (waxes or oils will livelihood your feet from getting wet and exacerbating physiological condition), or the tred is ample to prevent slips and body of water (the number-one make happen of alteration and lesion in the outdoors - bar none).
There is an old formula for sealing victimisation bees wax and coal conserve melted equally in isochronal surroundings and rubbed smartly into a warm shoe or lash out (it softens the keeping at the very occurrence). You will entail to dry and fry position and boots on the unequivocal door of an oven, hot to roughly 200 degrees. When the boots were dry and hot, they would tap Neat's-foot Oil into the pores of the animal skin. It is named the period shoe-bake.
There are a lot of well brought-up commercial waterproofs for boots that manual labour as ably. Snow Seal is one that was make out western in the U.S. and plant beautiful symptomless sealing they counsel. It's be either silicone, a polymer, or numerous kind of organic oil or wax. Clean the boots, let them dry, and employ the sealing reported to tips provided near the service.
There are crucial advices on products & methods of waterproofing a collapsible shelter. The best possible pitch is to go to a bivouacking supply and buy commercialized seam sealer and sealing supplies. A lot can depend on the form of artefact and where it is unseaworthy.