these thermal insoles utilize NASA-developed Outlast technology

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

Designed for active youngsters

Designed for all genders

Collar Knit (54% RPET

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