Sole: 70% synthetic rubber

they offer a comfortable

Air drying is recommended

They adapt to your feet and balance comfort and true barefoot feeling

Vivobarefoot Thermal Insole Womens Size:40 Sole: 70% synthetic rubberDescription Improve foot warmth in colder climates with this specialized insole. Its 3. 5mm profile, which incorporates Outlast technology, provides effective thermal protection. Fits all shoe sizes, it's a vegan option that maintains a natural foot feel. NASA Technology : With Outlast technology for temperature regulation, these insoles ensure feet stay warm without overheating. Slim design : With a thickness of only 3. 5 mm, the insole supports