Cushioning Gel insoles absorb shocks thanks to the dynamic cushioning gel concept developed by Sidas. Innovation : dynamic gel cushioning for maximum cushioning of the heel. Cushioning Gel insoles absorb shocks thanks to the dynamic cushioning gelconcept developed by Sidas: a network of gel microbubbles placed in the impactzone is gradually deformed with the impact, thus providing an exceptionaldynamic cushion. Anti-bacterial and washable insoles.