Anti-smash And Anti-stab Steel Toe Anti-static Work Safety ShoesColor: AK222 brown, AK227 black Function: Piercing damage Material: first layer of nubuck Upper style: middle Use range: construction site, leisure, machine repair, outdoor Size: 39,38,40,41,42,43,44,45,46,47,48 Model: 36 US4,37 US5,38 US6,39 US7,40 US7. 5,41 US8,41. 5 US8. 5,42 US9,42. 5 US9. 5,43 US10,43. 5 US10. 5,44 US11,45 US11. 5,46 US12,47 US13,48 US14,49 US15 Whether anti static: Yes Baotou material: steel toe cap Is there any ventilation