What are the most comfortable safety boots​?

safety shoes are indispensable daily protection products for labourers. With the development of human society, it is also developed from the original single protection function to the consumer products for labourers in specific environment.SONICE, as a safety shoes manufacturer, has the responsibility to let people enjoy the functional convenience brought by safety shoes in different environments.There are five main factors affecting the comfort of footwear products: last design, upper design, bottom part design, material selection and process design. design, upper design, bottom piece design, material selection and process design.
The influence of last design on the comfort of shoes 
The last design is based on the data of each part of the foot, which belongs to the first place from the point of view of footwear design. The good or bad design of lasts directly affects the beauty and comfort of shoes.
1. There are four arches in the foot, i.e., transverse arch at the front and back, and longitudinal arch at the inside and outside. During the movement of the foot, the four arches play the role of a spring to slow down the recoil of the ground. If the convexity of the forefoot is too big when designing the last, wearing shoes made of this last for a long time will cause the ligament of the anterior transverse arch to be damaged and lose its elasticity, which will lead to its subsidence, and then cause the posterior transverse arch and the internal longitudinal arch to go down, resulting in the formation of flat feet. Flat feet are easy to make patients strain and hurt during long time exercise and standing. When designing the forefoot convexity, it is important to design for the front and rear stilts based on the human foot. Front stilts, based on the natural stilt of the foot, the height of the front stilts of adults is generally controlled at 15-18 heh, too high, will lead to the forefoot convexity is too large. The higher the stilts are, the smaller the convexity of the forefoot is, and the smaller the stilts are, so as to ensure the grounding area of the forefoot, so that the wearer will not break his foot.
2. Metatarsophalangeal joint is one of the main parts to bear the weight and labour load of human body, and it is the key part of bending when walking. Whether the size of last metatarsal circumference and the arrangement of flesh are reasonable, it will affect the wearing comfort and the service life of shoes. Metatarsal circumference is large, the foot in the shoes produce movement, also unfavourable. The rear height is generally 20-40 old n is more suitable.
Upper design
The design of upper is based on the law of foot shape, physiological structure of the lower limb and sports function, material and technology, which transforms the design into a real thing, and through the design of the upper, the design can be smoothly transitioned to the stage of product processing, so as to produce the products conforming to the design.
1. When designing full shoes, the length of the front face of the shoes should be controlled on the last surface - the control point of the mouth position, because when the human body squats or bends the foot, the foot's boat on the curved point of the site becomes thicker. The length of the front face generally does not exceed the mouth door position to facilitate foot movement and prevent the tongue or lugs and other gang parts from grinding the foot and knocking the foot....
2. For the shoes with short front face, the midriff and back part should increase the heel design, such as strip or small package heel, hold the foot strap design, etc., so that the wearer can walk without effort. Common in the design of women's sandals, the front of the narrow strip or short front gang, walking feet can not be lifted, dragging the heel to walk, it is very difficult, at this time should be in the back to increase the heel design.
3. High back seam
In addition to high-waisted, tube boots, the general short shoes have to control the height of the back of the middle seam. Especially leather shoes, leather shoes because of the main heel, too high back help will cause abrasion, card feet. Too low, its shoes do not follow the foot. Its height control in the heel bone above the upper edge of the point, the range can not be too large, depending on the experience and process methods and set away a reasonable size.
4. back gang inside and outside the ankle high in the general design of short shoes, sketching the back gang curve, to control its height, the theory is based on the foot inside and outside the ankle bone high. The height of the lower edge of the ankle bone centre is based on the law of the foot, and can only be lower than this value and not high. Otherwise, it will wear the ankle bone and damage the skin of the foot. And note that the height of the inner and outer ankle bone is not the same, the inner ankle bone is higher than the outer ankle bone, when designing, you can consider that the inner pocket is higher than the outer pocket by 2-3mm.
5. Mouth
The position of the mouth gate is controlled at the bending part of the instep movement, because the deep and narrow design of the mouth gate is easy to make the gang torn and inconvenient to put on and take off.
6. Little toe control point
If the position of the broken gang or the strap of sandals is designed at the end point of the little toe, if it is not controlled properly, it will cause the little toe to suffer from the problem of bumping and exposure, etc. It is common that some women's little toes are drilled out from the gap of the strap of sandals, and the little toes are vulnerable to external injuries and are not comfortable when walking.
7:Heel control point
Generally control the position of the columns on both sides of the back of the sandals to improve the carrying capacity of the upper to the heel.
Influence of bottom parts design on comfort
       The design of bottom parts includes the design of sole, heel, main heel, inner wrapping head, inner sole and so on.
1. The design of the sole should not be too bulky. For shoes worn in winter, a slightly thicker sole design is good for isolating the cold air from the ground and maintaining the normal temperature of the feet. If it is too thick, it will make the foot feel poorly on the ground, which will easily make the centre of gravity deviate and the phenomenon of waking up will occur. The design of the sole pattern affects the non-slip performance of the shoes. The bottom pattern design should be resistant to lateral and vertical slip. Good anti-slip effect, increase the friction between the sole and the ground when walking, people walk easily with the help of ground reaction force. On the contrary, it is difficult for people to walk and easy to make their feet and body hurt. Special structural design makes the air inside the shoes replaced effectively during the movement and improves the comfort.
2. A reasonably designed heel can make the weight of the human body more reasonably distributed in the support points of each part of the foot, enhance the stability of the human body, and improve the elasticity of the arch of the foot. The height, size and shape of the heel affect the comfort of the shoes. The height of the heel depends on the height of the last stilts, and it is important to pay attention to the co-ordination between the two when designing or choosing. The lower edge of the heel bone is the main force point of the human body's centre of gravity, which is in the centre of the heel at the bottom of the human foot, so the heel seat surface, heel column and heel surface must be penetrated and contain the plumb line force between the lower edge of the heel bone and the ground. The size of the heel seating surface affects the fastness of the heel assembly. Heel surface is large, and the heel part of the sole has a large contact area, and it is not easy to shake when wearing; the size of the heel surface affects the ground area, and plays the role of stabilising the centre of gravity. The heel shape with small width at the bottom, it is not easy for people to grasp the balance in the movement; the heel shape with width and no thickness looks light and elegant, if the assembly position is backward, it is easy to make the heel tilt backward when walking, so that people have the feeling of front frustration, and it is easy to make the heel tilt backward when walking, so that people have the feeling of front frustration.
3. The length of the inner head should not exceed the bending part of the foot, otherwise, the foot will be restricted in bending and there will be hidden danger of card and foot grinding.
4. Due to the physiological characteristics of the foot, the distribution of sweat glands in the human foot is not balanced. The density of the heart of the foot and metatarsophalangeal joints is the highest, and the heel and instep are less, so it is necessary to pay attention to the breathable and sweat-absorbent design of the insole, insole and lining in the forefoot area. Insole design increases softness and breathability. For the inner sole of sports shoes to increase the midsole design, the use of elastic materials, so that the impact of the foot and the ground to be relieved.

Influence of material selection on comfort
The selection of shoe materials is not only for appearance, but also, to a large extent, from the consideration of hygienic performance of shoes. The comfort of shoes is related to the microclimate inside shoes formed by it. The natural grained leather and cotton textiles in the group gang materials have excellent hygienic performance, because the materials are breathable, water vapour permeable and moisture absorbent, and also have the prerequisite of not smothering and covering the feet. At this stage, various synthetic leather and artificial leather developed in China are far inferior to natural leather in terms of hygiene performance, so when designing, choose suitable materials according to the style, wearing conditions and environment to improve the wearing comfort of shoes. Though the leather with heavy decoration and two-layer leather belongs to leather shoes, its surface is covered with coating, and the pores of natural leather are blocked, so its breathability and water vapour permeability are greatly reduced. The upper textile materials should pay attention to the selection of breathable, moisture absorption, lightweight, soft, bactericidal, anti-odour and other materials with good hygiene performance and comfort. Excellent materials for upper should be used in conjunction with lining, inner sole, inner head, adhesive and other materials in order to give play to their superior performance. Rico, the closest contact with the foot in the shoe material, accepts the foot to bring steam and sweat, if the lining material itself does not have the function of breathability and moisture absorption, the hygienic performance of the fabric will not be brought into play. Good quality shoe insole materials should be moisture-absorbent, breathable, with better dimensional stability, flex resistance, etc., in order to meet the requirements of use, but also will give the foot a comfortable bottom environment.
The performance of the sole material greatly affects the comfort when wearing. Selection is based on the occasion and purpose of use of the shoe. For general shoes, the soles designed for use should be of light quality and moderate hardness. Hardness is too low, there is no rigidity, the foot is easy to strain; too high, walking board feet, can not bend with the foot, both easy to cause foot fatigue!
The impact of the production process on the comfort of safety toed shoes
Production process on the impact of safety shoes, that is, due to improper or not in place process operations, resulting in the impact of shoes. Improper or inappropriate process operation will affect the appearance of shoes, wear life and wearing comfort. The following aspects will have an impact on the comfort of the finished shoes.
1. Due to the over-thickness of the articulation parts of the components, the edge of the piece in the process operation is not done well, resulting in the edge of the foot abrasion; the main heel, the back edge of the inner head is not sliced into a smooth slope, there are hard prongs, resulting in the abrasion of the foot.
2. Stretching process due to the lining cloth, leather is not stretched to form folds, serious cases will affect the comfort.
3. The surface and lining materials are not bonded well, resulting in layering so that the foot activity space is reduced, the back of the foot has a feeling of pressure, especially thick lining materials feel obvious.
4. The inner sole should be treated with a certain friction with the sole of the foot, so that the foot does not slip in the shoe cavity.
5. Hook heart, the spine of the shoe, plays a role in keeping the bottom curvature and stabilising the heel. It is especially important for middle and high heels. The hook centre should be installed on the heel parting line, if the angle is not right, it will cause the foot to be unstable when wearing shoes.
6. Control the height of the back seam of the heel. Because of this size control, it is the last gate to ensure that the heel is not stuck or rubbed on the basis of reasonable lasts and help.
7. The position of the assembled heel is very important, especially for women's shoes with a small heel shape. It must be mounted on the heel force position, and it should be mounted on the car and mounted correctly to prevent the wobbling of the heel and the misalignment of the foot and the human body from causing harm. The comfort of the shoe is also related to the way it is worn. Whether the use of insoles, whether regular drying, changing shoes, and with the socks worn with hygiene performance, and other factors.
In short, high-quality safety shoes not only have an extraordinary appearance design, but also to improve the many factors affecting the comfort of the shoes, so that the shoes can meet the workers' work safety and spiritual support.