Some main types are: Sleeves - Slip-on sleeves that offer light compression and warmth. Straps - Braces with velcro straps above and below the knee for adjustable support. Hinged - Braces with medial and lateral hinges that support ACL/PCL or MCL/LCL injuries. Custom - Custom made rigid braces for severe knee injuries. Knee pads - Light padding that slips over the knee for impact protection. Rehabilitative - Post-surgery braces to immobilize the knee during recovery.