multibuy information: £4 saving when you buy 2. select first size from the drop down menu above and add to basket then select second size and add to basket. discount will be automatically calculated. extra knee support when you need it our knee support is professionally designed to give steady support and relief to those who suffer discomfort or occasionally feel their knee buckling whilst walking climbing stairs jogging or during any type of physical activity. embedded in the fabric are ceramic particles designed to absorb heat and reflect it back into the soft tissue surrounding the knee. its like having infrared treatment around the clock! the unique neoprene/polyamide material is designed to give even support and heat distribution. the knee support custom fits with hook and loop and stays comfortably in place while bending sitting or standing. weighing approx. 65g (2.3oz) its light not visible under clothing and adjusts to fit. choose from x small (xs) 24cm32cm/9½in12½in small (s) 28cm36cm/11in14½in medium (m) 34cm44cm/13½in17½in large (l) 42cm50cm/16½in20in or x large (xl) 52cm60cm/201/2in231/2in.