Here is some advice for buying a bulletproof vest.  Choose your protection level.  Handguns or Rifle: Handguns: 89% of gun crime happens with handguns, and level IIIA soft armor will stop almost every handgun.  So level IIIA is my suggestion.  Rifles: If you might be involved in active shooter situations or you want something to wear while deer hunting on public land, you'll need rifle protection. This requires hard armor like our ceramic or PE plates.  Level III is good for active shooter scenarios, but if you are hunting go with level IV to stop the rounds that deer hunters use. Choose your coverage area.  Most people choose the coverage of a standard bulletproof vest. A vest covers almost twice the area of a standard plate carrier with 10x12 plates or soft panels, yet it costs just slightly more.   Choose your size carefully.  Bulletproof vests do not fit like a shirt.  Your shoulders, arms, and neck all fit outside the vest.  The most important things about finding the right vest is your height and weight.  Use our size chart to pick the right vest for you.  Find your height and weight on the chart.  Order this size show. If you are between two sizes: If you are fit and have a flat stomach, choose the smaller size. If you don't have a flat stomach, choose the larger size.  This size is probably not the size shirt that you wear.  Don't worry.  Height and Weight is more important. 

The police body armor is composed of a jacket and a bulletproof layer. The bulletproof layer is mainly made of metal and other protective materials, which can absorb the kinetic energy of the warhead and reduce the speed of the warhead, thereby protecting the human body. So, what kind of process did the body armor go through? What are the relevant properties of the inner body armor? Let’s take a closer look at the history of bulletproof vests and related characteristics. Special bulletproof clothing Lightweight bulletproof clothing is a kind of personal protective military uniform used for protecting the human torso from projectiles or shrapnel, mostly in the shape of a vest. Bulletproof clothing made of bulletproof layer and jacket is a kind of individual protective military uniform used for protecting the human torso from projectiles or shrapnel. The thickness of the bulletproof layer is determined by the balance between protection performance and wearing comfort according to different objects. Soldiers wearing alone can significantly reduce battlefield mortality and injury rates.   Police bulletproof clothing is developed on the basis of armor. During the First World War, 80% of the total casualties on the battlefield were caused by low- and medium-velocity stray bullets or fragments, and experts were inspired by ancient armor to develop alternative bulletproof suits in the late war. In World War II, casualties caused by shrapnel still accounted for about 60%. People paid more and more attention to the development of bulletproof clothing. In the early 1940s, the United States and some Western European countries began to develop alloy steel and aluminum alloys. , Chin alloy, glass fiber reinforced plastic, ceramics, nylon and other materials bulletproof clothing, and used in the battlefield.   In the 1960s, the second generation of bulletproof clothing that replaced high-quality steel with high-quality chemical fiber materials began to appear. Since the 1970s, bulletproof clothing has undergone new developments. Body armor can be divided into three types: soft, hard and soft-hard composite. The material of the soft body armor is mainly high-performance textile fibers. These high-performance fibers are much higher than the energy absorption capacity of general materials, giving the body armor the bulletproof function. softness, called soft body armor. The protection level of soft body armor is usual NIJ IIIA AND below.

Many people may have a certain misunderstanding about bulletproof vest, thinking that as long as the bulletproof vest is not damaged, it can be effective for a long time. But this is not the case. Regardless of whether it is damaged or not, with the increase of the service life, the bulletproof performance of the bulletproof vest is also constantly declining. The shelf life of bulletproof vest is affected by many factors, and it is very important to understand the factors that affect the efficiency of bulletproof vest for better preservation and prolong its service life. Normally, most bulletproof products can maintain a shelf life of more than 5 years. Very few bulletproof products have a shelf life of about 7 years due to the material. However, if it is maintained and paid attention to during use and storage, its validity period can be effectively extended, otherwise, even if the bulletproof function is rapidly reduced or even invalidated within the validity period, it is possible. So how to properly use and maintain bulletproof vest? 1.Regular cleaningTo prolong the service life of the bulletproof vest, it is very important to keep the bulletproof vest clean and clean. The bulletproof vest jacket can be washed in the washing machine, but it must be ensured that the bulletproof chip is taken out before putting it in the washing machine.When cleaning the bulletproof chip, you need to prepare a sponge and a small bottle of cleaning agent, use the sponge dipped in the cleaning agent to gently wipe the surface of the chip, remember not to immerse the chip in water, and do not use an ironing board to iron the chip wrapping cloth Because it is easy to burn the wrapping cloth accidentally, which will cause the chip to be eroded by air or moisture and stains during use, which will lead to a decline in the bulletproof function in the long run.   2. Avoid sun exposureExposure to sunlight accelerates the ageing of material fibers,  thereby reducing their service life and ballistic resistance.3. Usage frequencyThe bulletproof performance of the bulletproof vest is also related to the length of use. The longer the use time, the lower the bulletproof performance and the shorter the validity period. Therefore, if conditions permit, it is best to prepare a set of replaceable bulletproof vests, and two sets of bulletproof vests are used in rotation. It can prolong the service life of bulletproof vest as much as possible.   4. Replace damaged bulletproof vest in timeOnce the bulletproof vest is hit by a bullet, it should be replaced immediately, because even if the bulletproof chip hit by the bullet is not damaged in appearance, the strong impact will inevitably lead to changes in the microstructure of the material, thereby affecting its structural stability and ballistic performance. Replacement, then once the bullet hits the same position in the next use, the possibility of the chip being broken down will be greatly increased. Therefore, from the perspective of your own safety, the bulletproof vest that has been hit by the bullet must be replaced in time.The above is a summary of the precautions for the use of bulletproof vest. Only by giving the bulletproof vest proper maintenance during the use process can the validity period of the bulletproof vest be severely punished and its ballistic resistance can be maintained.

In daily life, if we are careful enough, we will find that many skyscrapers, truck covers, oil platforms, and bulletproof equipment have a common material – polyurea. The popularization and promotion of polyurea is said to have originated from the experiments of a group of Italians. They tried to free fall the polyurea-coated watermelon from a height of 45 meters, and the watermelon bounced back when it landed, and its appearance was intact. In order to further verify the protective ability of polyurea, some people also tried to spray polyurea on eggs and tested, and the eggs were also intact. With its excellent protective properties, polyurea has become more and more widely used in various fields from heavy industry to agriculture, especially in the field of protective products, its application is also more and more promising.   Polyurea is formulated from specific raw materials in a specific proportion. Its specific material formulations are kept secret commercially, but the basic ingredients can be identified as a combination of isocyanate and polyol resin. Polyols primarily act as plasticizers, and when the two components are combined, they polymerize to form a long-chain molecule. Long chains of molecules are intertwined with each other to form an indestructible material called polyurea. In addition, these long-chain molecules are stretchable and have high flexibility, which also endows the polyurea material with ultra-high tensile and tear resistance.   In addition, polyurea has many performance advantages, such as:Quick-drying – Polyurea coatings sprayed on surfaces such as various instruments and equipment can be dried and set in seconds and are ready for use.Very high wear and compression resistance.Good chemical resistance.Super airtight and waterproof.Does not contain VOCs, CFCs, solvents, etc., and does not cause any pollution to the environment.   It is precisely because of these characteristics of polyurea that it has a lot of attention to its use method and application. At present, polyurea is usually coated on the surface of objects by thermal spraying, which is time-critical because once the two components of the coating are combined, the reaction starts immediately and cannot be reversed. In the process of use, the two coatings need to be pressed into a special spray gun through a heated hose, the two are quickly mixed at the moment of spraying, and then quickly dried and formed in a few seconds.

A bulletproof vest is composed of plate carrier clothing and ballistic plates. What really plays the bulletproof role is the ballistic plates. The clothing is just the carrier but not bulletproof.Ballistic plates are divided into two categories. One is soft plates (relatively weak protection ability), and the other is reinforced / composite hard plates (relatively strong protection ability).The soft plates are usually made of high-performance fibers (such as UHMWPE and Kevlar). Its bulletproof principle is that when the bullet / fragment hits the fiber layer, the huge impact force will be consumed when stretching and shearing the fiber layer. At the same time, the fiber layer will spread the impact force generated by the bullet / fragment to the area outside the impact point, so as to absorb the impact force. The soft plates can resist the bullets of pistols and shotguns or fragments of explosives such as grenades, as well as long-distance automatic rifle attacks (not at close range). The hard plates are made of metal, ceramic, high-performance composite plate and other hard materials on the basic of soft plates. The bulletproof principle is that when the bullet hits, firstly the metal plate, ceramic plate or composite plate in the bulletproof plate contacts the bullet (equivalent to the first line of defense). At the moment of contact, the bullet and these hard bulletproof material plates may crack, which consumes most of the bullet’s energy. As the second line of defense as well as a buffer, the soft bulletproof material absorbs and diffuses the remaining energy of the bullet, so as to achieve the purpose of bulletproof. The hard plates can resist more powerful weapons, such as automatic rifles.