safety boots - the evolution and construction of safety footwear
As early humans settled in a more moderate and extreme climate, the need for \"Feet\" drove people to design many ways to cover and protect their feet.
Evolution began with simple sandals in 7000 BC and quickly evolved to provide protection and warmth for feet and legs.
The making of shoes has become a professional skill, a shoemaker or a shoemaker, who is the one who only repairs shoes and who produce a range of footwear products using many techniques.
In the 17 th century, this method became the most popular, still so today, it adopts the \"sole\" of shoes made of tough materials and soft materials \", and stitch them together at the \"last.
This is a metal or wooden foot mold used by Shoemaker to assemble shoes.
Until the beginning of the 18 th century, after making the \"Last One\" for each foot, the left foot or the right foot made the shoes without distinction.
The part outsole of the modern lower foot is a layer in direct contact with the ground, made of synthetic materials such as rubber or polyurethane.
The outsole can be made from separate materials with different properties.
Most work boots have a dual density structure, usually two different types of materials.
The external material is a harder wear-resistant layer, while the interior is softer and provides a cushion along the entire foot bed.
The footbed is the inside bottom of the boot, directly under the soles of the feet, called the sock lining.
The insole is connected to the \"last\" edge of the upper, and during the final assembly, the insole is wrapped at the \"last\" edge during the boot closure.
The footbed is made of a kind of cardboard or synthetic cardboard.
Many boots have removable and replaceable foot beds, so it can be adjusted for the wearer who needs additional support to help handle the natural shape of the foot or the positioning defect of the foot when standing.
Additional buffer elements can be added to improve comfort or to handle moisture, shoe odor or other health reasons.
The middle bottom is located between the outer bottom and the insole for shock absorption.
Some types of sneakers add other materials to the heel area to increase shock absorption.
Different companies can use several different materials to make the midsole, and some boots may not have the midsole at all.
Protect the bottom of the midsole to protect the foot from sharp objects in the workplace.
The protection plug-in is added to the midsole area of the boot, traditionally made of a piece of steel in shape.
Today, thanks to the advances in material technology, many boots have the mid-bottom of the Kefla fiber protection.
For decades, the protective head of safety boots has been made of steel.
Composite or non-today
The metal shoe head is becoming more and more popular due to its light weight and is not susceptible to temperature changes.
A temperature change in the steel toe cap can cause internal condensation, damp the inside of the boot and cause blisters or foot sores.
HeelThe heel was added to footwear in the 15 th century, so that the boots of the horsemen would not slide down from the horse stir.
Today, it is usually used for people who use ladders or similar jobs where the extra heel height is advantageous.
The heel is usually made of the same material as the sole of the boot, and for most people the flat heel is more practical and comfortable.
Each boot or shoe on the upper or upper has an upper part that holds the shoe to the foot.
Sandals or flip
This could be a few straps or a toe post.
The modern safety shoes range, which includes boots, sneakers, shoes, hikers and sneakers, will have more sophisticated uppers.
This part of footwear has become a major area for increasing decoration, and for centuries it has marked the transition from functional footwear to \"footwear to see.
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