Adidas ADI SOCK 21 Football Sock. When it's time to show your skills, complete your kit with these adidas Adisock 21. Moisture-absorbing Aeroready ensures your feet stay dry, and their right- and left-specific construction delivers a secure fit. Padding in high-stress areas keeps you comfortable until the final whistle. MATERIAL: 71% POLYESTER, 25% POLYAMIDE, 4% ELASTHANE.