Shop Underpronation Achilles Tendonitis Arch Pain Arthritis Athlete’s Foot Blisters Bunions Callus HomeConditionsUnderpronation X-Line PressurePerfect The X-Line Pressure Perfect was designed for the ‘at risk’ feet such as people suffering with diabetes, rheumatoid arthritis, with poor circulation of blood in the feet.It is medium-soft insole. £29.95 + More Stay one steap ahead in the treatment of foot and lower limb conditions. Call the HealthyStep team on 01457 839549