The innovative SyncrogelX3 Insoles is made of SX3, a
  completely new type of multi-functional material with
  extreme high energy absorption values and optimal
  restoring characteristics.Tested by Marburg University,
  it offers excellent advantages:
• High energy and shock absorption values for both heel and
  ball area: 9.5 Joule is four times higher than that of a
  standard footbed.
• Spinal diseases and disorders of joints are prevented by
  the optimal cushioning characteristics of SX3.
• Comfortable and smooth when wearing, and especially for
  highly sensitive feet.
• Protected by an anti-allergenic covered layer, which is
  breathable and wear resistant.
• Designed for being used in ESD areas.
• Sizes: 38-48