They stretch to let you move, they're adjustable for the perfect fit, and reinforced hems keep them stronger for longer.Ared V02 20000 polyester 4-way stretch fabric with DWR finishTaped seamsHigh loft polyester insulationWarm touch lining to upper legsAdjustable detachable braces with front slider systemElasticated waist adjusters2 x side zipped pocketsWarm scrim pocket liningArticulated knee designReinforced binding at hemTab up hemGrow cuffs at hemIntegral snow gaitersReflective detailing