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 AT Insoles The AT insole is an orthotic device designed for Achilles Tendinitis / tendinopathy,This is the first insole ever designed specifically to resolve over-strain and pain of the Achilles tendon. £37.95 + More Stay one steap ahead in the treatment of foot and lower limb conditions. Call the HealthyStep team on 01457 839549