Knee socks Gravity Rush black / keef 2019/20 Knee socks keep feet warm, great for sweat and excess moisture. Padding on the shin, calf, heel and toe absorbs shock and eliminates pressure sores. Knee socks retain their shape even after many washes. Material: 48% merino wool, 23% polypropylene, 14% polyamide with silver ions, 15% elastane Made in the Czech Republic * Merino wool - sheep wool comes from mountain sheep originally living in Spain, from where they gradually spread to