Features: 1. PU sole, by high-pressure direct injection, is integrated with instep that can offer superior abrasion resistance. 2. The sole by the design of streamline shape provides better fitness for human ergonomics demand. 3. Special sole thread design and thicken sole equipped with better shock absorbency. 4. Adopting polyester fiber as the upper part of boots, which is excellent in shape retention, it maintains wearing comfort and also easy to wear. 5. The insole applied by specially processed fiber, which is excellent in sweat absorption and dryness, maintains comfort despite house of wear. 6. Special sewing skill on the hemming and piping that can extend the lifetime of super-clean shoes and boots. 7. Electric Resistance Value (Ω): 1.0 x 105Ω ~ 1.0 x 108Ω. meets with JIS standard. 8. Size: 22 ~ 27cm (0.5cm pitch) 28 ~ 30cm (1cm pitch)