adidas outdoor 2015 Men's CH Felt Boot M Winter Sports Boots - M18760 Upper: Primaloft Gold insulation material for more warmth, even in wet conditions Upper: Water resistant felt with excellent insulation properties. Upper: Rubber toe and heel caps plus a TPU mudguard for optimal protection in winter. Outsole: Super high traction rubber for optimal grip in winter conditions Primaloft Gold weight: 100 grams.