Gore174 windstopper174the windstopper174 membrane is an ultra light coating which is laminated on a light textile and provides absolute windproofness the micro pores of the laminate are 900 times bigger than water vapour molecules so that sweat can escape unhindered due to this unique membrane technology all windstopper174 products are completely windproof and breathable mititech174 thermalmititech174 thermal fabric is an innovative bi elastic technical fabric with lycra de