these thermal insoles utilize NASA-developed Outlast technology

Easy to put on: A practical zip on the side makes it quick to put on and take off the boots

Vegan and animal friendly: Made from sustainable materials free of animal products

Tested Robustness: Thoroughly tested

Outsole: Flexible rubber

Xero Shoes Z-Trail EV Womens – Sandaler – Magenta Size:42.5 these thermal insoles utilize NASA-developedDescription Experience natural movement in the Z Trail EV sandal, designed for versatility in nature and the city with a sustainable touch. Ideal for both trail adventures and city walks. FeelLite comfort. The 10 mm thick sole provides a balance between protection and sensitivity. The TrailFoam middle layer and the updated pattern ensure comfort and grip, stable on varied surfaces. Environmentally friendly design. These sandals reduce environmental