Shop X-Line X-Line Products Designed by in-house podiatrists, our X-Line range offers precision treatment for a range of foot and lower limb conditions. See our full range of products below. HomeShopX-Line X-LINE TPD SHOCK PACKS The Shock Pack version of the XLine TPD device contains a full-length die-cut layer of self-adhesive shock absorbing foam, along with rearfoot 4-degree medial wedges and heel lifts. + More Stay one steap ahead in the treatment of foot and lower limb conditions. Call the HealthyStep team on 01457 839549