Profile Design's F-19 Replacement Pads are the correct ones for their F-19 armrests. These pads feature Lycra-covered medium-durometer foam and are held on with two sided Velcro.
Picture above is of old model pads with Velcro straps. New model is attached with dual sided adhesive Velcro.
Old model with straps is no longer available from manufacturer.
39 grams (pair)