- Size: 39 • Breathable Upper: The shoes are made of high-quality breathable materials, providing comfort and warmth in cold environments. • Warm and Comfortable: The soft cotton fleece lining hugs the feet and provides superior warmth. • Fully Closed Heel: Design that wraps the entire foot, effectively preventing the heel from slipping. • Abrasion and Slip Resistant: Non-slip rubber sole that enhances grip and abrasion resistance. • Memory Foam Insole: High elasticity that conforms to the foot and provides support and cushioning.