1. The surface layer of JP velvet, soft hair, light texture, sturdy, good drape 2. The bottom layer SEBS, non-toxic, has good stability and aging resistance, heat resistance, high elasticity and compression is not easy to deform 3. U-shaped and cup design can better fit the heel, relieve the pressure on the sole and make walking more comfortable

http://olla.gr/1-pair-military-training-shock-resistance-sports-insoles-soft-and-comfortable-stretch-thick-insoles-size-s-34-37-yards-blue/