MK3 Glacier Thermal SocksTabs Description Our Most extreme cold water sock available Breathable, moisture-wicking, high loft, insulating polypropylene Polar Fleece inner lining Storm Proof 70 denier micro-ripstop water-resistant Taslon outer nylon facing Primaloft® sandwiched between fleece lining and nylon facing Sole and heel are reinforced with a heavier nylon for durability Complement this with the MK or MK3 Undergarments Sock can be worn alone or with a very light polyester sock to minimize laundering Specifications Part # Description Size 611632 Mk3 Glacier Thermal Socks 4/5 611633 Mk3 Glacier Thermal Socks 6/7 611634 Mk3 Glacier Thermal Socks 8/9 611629 Mk3 Glacier Thermal Socks 10/11 611630 Mk3 Glacier Thermal Socks 12/13 611631 Mk3 Glacier Thermal Socks 14/15