NO PRESCRIPTION REQUIRED: Same ThermoActive technology of our medical line, but adapted for consumer use. Included air pump provides precision Compression Therapy adjustments.nHELPS ACCELERATE RECOVERY from knee injuries while delivering targeted relief for pain and swelling.nHOT OR COLD THERAPY: Either heat in microwave or chill in freezer, depending on stage of recovery.nSIZING: Above Knee: up to 21u0026#34; circumference Below Knee: up to 20u0026#34; circumferencenIncludes 1 knee brace support, 1 air pump, 1 removable hot/cold gel pack.n