these thermal insoles utilize NASA-developed Outlast technology

The 10 mm thick sole provides a balance between protection and sensitivity

Hygiene and Freshness : The material mixture is bacteria-free and odor neutralizing for lasting freshness

Comfortable waist elastic : An elastic that does not tighten ensures a comfortable fit and does not cut into the skin

Designed for active youngsters

Filii Viper Velcro "Medium" Size:21 these thermal insoles utilize NASA-developedDescription These children's shoes are a practical choice for outdoor and everyday activities, suitable for EU sizes 22 35. They combine technical performance with a minimalist style. Thin and Durable Sole: A 3 5 mm thick rubber sole provides a balance between flexibility and durability. Its minimal tread pattern ensures grip while maintaining a barefoot feel. Single Velcro Strap: A single Velcro strap ensures quick adjustment and a secure fit that