Used for safety sneaker 27 cm with Okamoto iron core. Originally the safety shoes sneakers themselves are also good products, but putting this sole, the comfort is greatly improved, I am satisfied very much because it makes me feel uncomfortable. In addition, although stainless steel which is put in is firm and firm, we do not hold light lightly. Finger protection metal at the top of safety shoes, feet is fully covered with metal of the full cover, but while the foot is almost protected, it is comfortable to exhale, not too heavy and very satisfied. We recommend you to wear it all year round. I will continue to purchase it in the future.