• The sole is made of elastic TPU material and the exterior of the shoe is made of high-quality POM material
• The interior is made of soft breathable fabric that can be removed and hand washed, adjustable to 3 different foot sizes
• The spring has enough elasticity to withstand active load for 50 to 70 hours, then it is recommended to be replaced

The maximum weight of the user is determined by the size of the shoe and is as follows:

• Size S (number 30-32) - maximum weight 20 to 30 kg
• Size M (number 33-35) - maximum weight 30 to 40 kg
• Size L (36-38) - maximum weight 40 to 60 kg
• Size XL (number 39-41) - maximum weight 60 to 80 kg