Don't be fooled by their odd looks! Like all RBH VaprThrm®  products the Hi-Rise sock works by blocking evaportive heat-loss keeping heat and moisture from moving into the insulation of the 200 weight Polartec fleece as well as the inner boot. The technology has performed beautifully (for close to two decades) in the coldest and highest places on earth. 

After repeated requests for custom calf length Insulated Socks we now offer this version which stands 15.5" (a full 4.5" taller than the original).  The sole shape is exactly the same for this version as it is for our Vapor Barrier Liner and Insulated Socks.  However, the volume in the foot and ankle has been reduced to eliminate folds and pressure points to accomodate lower-volume footwear.  This is the ideal sock for telemark boots, snowboarding boots as well as trimmer mountaineering boots. Calf measurements range from 14.5" for size 5 and 16.5"  for size 11 with aprox 0.33" increment between sizes. The material has minimal stretch, so if you have muscular calves that measure more than our pattern, order a custom calf circumference  to avoid constricting circulation. 

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