The matt appearance and fine natural looking 15 denier leg of these pretty polly everyday silver fresh knee highs keep your feet fresh and deodorised with their own inbuilt moisture management system silver controls the development of bacteria and fungus keeping pongs at bay the silver fresh treatment of pretty polly footsies is clinically tested to last for 40 washes your fresh happy feet will be matched by your legs as pretty polly everyday silver fresh knee highs have comfort welt top