It is manufactured from air and woven fabric. Inner silicon pad support patella perimeter. It provides pain relief due to radiete heat and with compression on this area. Recommended for people who have pain behind their knee cap with difficulty climbing stairs or squatting. Indications Intra articular liquid increase Rehabilitation after surgical intervention Protection during and after the sportive activities Knee pain Arthritis SIZE KNEE CIRCUMFERENCE(cm) S 31-34 M 34-37 L 37-40 XL 40-44 XXL 44-48 Declaration of Conformity CE