VaprThrm® Hi-Rise Insulated Sock

Don't be fooled by their odd looks! Like all RBH VaprThrm®  products the Hi-Rise sock works by blocking evaporative heat-loss keeping heat and moisture from moving into the insulation of the 200 weight Polartec fleece as well as your inner boot. The technology has performed beautifully (for close to 25 years) 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 volume in the foot and ankle has been reduced to eliminate folds and pressure points to accommodate 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 approximately 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 c