Boots Sidi Roarr Black. Made in Technomicro material (replacement of the skin, very strong and sturdy) double-stitched in areas of greatest tension.Incorporating elasticated panels for comfort. Inside is covered in a mesh of Teflon for a good perspiration of the foot. Level of protection, have a plate of nylon in the area of the shin, heel protector shock-absorbing TPU, brackets anti-twist in the ankles, a system of "vertebra" patented to protect the area of the Achilles heel and sliders replaceable. The Sidi Roarr are certified EC.