What is the function of American military camouflage uniforms?

Take GEN III as an example, the latest clothing system of the Army.

L 1-L2 layer is underwear, L 1 is short sleeves and underwear, and the material is quick-drying chemical fiber. L2 is similar to our autumn clothes and long-sleeved trousers, and the material is light fleece plaid, which can not only ensure the comfort at high temperature, but also ensure the dryness of the body at cold.

L3 layer is fleece clothing, which adopts long wool and imitates the design of lamb wool. Thinner than the original P300, but the thermal insulation performance is close, mainly based on lightweight.

L4-L5 floors, although there are separate ones called L4 and L5, are generally defined as combat uniforms +L4 windbreaker coats and L5 temperate combat uniforms; As far as combat uniforms are concerned, the Army has issued UCP (commonly known as ACU), flame-retardant version and ordinary version, as well as ACS flame-retardant sweat-wicking tops, using digital camouflage. The normal version is 50 cotton and 50 nylon scratch-resistant warp and weft cloth (plaid cloth), and the flame retardant clothing is a composite flame retardant material. The new version has been treated with pest control, and ACS is a sweat-wicking suit designed for tropical vest assembly. The trunk part is honeycomb structure, and the material is basically the same as the flame retardant version. The design of quick-drying and perspiration has been added (OCP, which is limited to Afghanistan, is also designed in this way, and GEN II/III for special warfare is made by CP Company. Although they are all multi-camera camouflage, the details are different).

L4 jacket adopts the concept of skin windbreaker, and uses EPIC post-treated lightweight nylon cloth to obtain a semi-life splash-proof and windproof effect. In addition to not being resistant to high-temperature drying bleach, it will not lose its performance as long as it is not damaged, and there is no hat. The two diagonal zippers on the chest have the functions of pocket and heat dissipation, with a net pocket inside and a zipper under the arm for heat dissipation. L5 is a uniform, close to ordinary combat uniform, mainly used in temperate and cold regions, as a lightweight waterproof and windproof coat. Cloth and splash-proof treatment are the same as L4. The coat has a few more hats than L4, and the hem is longer, and the back half can almost cover the buttocks. Pants are designed as jackets close to L6, but the side pockets and thigh pockets are independent, so they can hold things, and the bottom pocket is cancelled. The side bag is a mesh bag structure for conducting moisture and removing heat. There are two zippers at the left and right sides of the calf and waist, and the two ends of the trouser leg are closed with beef tendons+the two sections are fixed buttons. You can choose to fix the inner strap or bring your own strap (you can search EPIC yourself, so I won't be burdensome, it's too long).

L6, lightweight jacket, although GTX is still the main waterproof material, it has been replaced by the latest wet coating technology and laser melting. The strength of the main nylon material is about 22D, and the elbows of the coat and the buttocks of the trousers are covered and reinforced with nylon cloth of about 120D (I may have made a mistake in the number of d). It is very light and thin, but its performance is the same as that of the second generation three-layer hot melt adhesive GTX, and it is more breathable. The shape design cancels all pockets except the arm pockets, and all zippers are YKK, but they are all ordinary versions, and they are all provided with double protection of the front flap, probably because the air permeability is better than before, and the design of the underarm cooling zipper is also cancelled. The hat is also retractable, the calf and cuffs are fixed with velcro+beef tendon, and the zipper at the calf is basically outside the knee; The zipper on the chest and thigh of the coat is directly connected to the inside after being pulled open, which has the function of heat dissipation. In the fully open state, it can meet the needs of inner and outer jackets, chest hem and trousers thigh pockets.

In principle, L4 and L5 can be used as separate coats or blouses, and can be used together with L 1-L3 in different climates and temperatures. L6 can only be a smock, that is, L3 and ordinary combat clothes that are usually put on. L4-6 does not have the ability to keep warm. Although the poor heat dissipation performance of L4 and L5 in a fully enclosed state will make you feel sultry, please don't try to keep warm only by these three layers.

L7, warm coat, upper and lower two-piece suit; The outer fabric is the same as L4\5, and the EPIC splash-proof treatment is also adopted. The inner lining part is plaid+mesh bag, which improves the hygroscopicity and prevents things such as adhesive tapes from scratching the combat clothes worn inside. Forget whether there is an underarm zipper design, the mesh bag basically plays the role of airflow; The filler is man-made chemical fiber (P something, the name has been forgotten), which has the same warmth retention and washability as fluffy down that down does not have. Even if it is soaked, it will not lead to a decrease in warmth retention. The disadvantage is that it can't be dry-cleaned, because the material is not heat-resistant. Just zip it up and throw it into the washing machine, and the washing powder will do. Although there is no problem with laundry detergent, avoid using the one with bleaching function. Jacket cuffs to elbows, trousers and knees are also high D nylon cloth rifles. It seems that the zipper on the outside of the calf can be pulled to the waist, and the pants can be separated directly from the side, which is convenient to use.

L3 and L7 can be used as coats in the base alone, and L7 is mainly used as a warm and strengthened combination of L 1-L3. At the same time, it should be noted that both the previous P300 and the new L3 have only the most basic splash-proof performance, and the warmth retention is also related to whether there is a jacket, temperature and system. As for the windproof ability, consider it as a joke. At present, only German velvet has wind-proof and splash-proof properties.

The hierarchical concept of OCP is the same as that of UCP. Camouflage is Multicam style, and the color of L3 layer is khaki, similar to brown.

This is basically the clothing system of the US military. The difference between the armies is that the L3 layer of the navy may still be a pure wool sweater, because wool has both warm and flame retardant properties, and there may be no L4-L5 layer; The Air Force will probably cancel the L4-L5 floors, but it does not rule out that a small number will be given to the ground rapid reaction forces below the Air Force. The L2-L3 of Marine Corps is a P 100 fleece suit with a pullover or a frog's flame retardant fleece, so it is possible to continue to use P300. After all, this thing is thick, and there is no concept of L4-L5. It was unified into a lightweight waterproof and windproof coat of CWLS Marine Corps. The basic design is the same as that of the Army L6, but the zippers are all replaced by YKK waterproof resin zippers. Except for the pants without any front cover, the underarm zipper design is also preserved. In addition, the unique CDJ combat jacket of the Marine Corps may be classified as a complex of L4-L5 layers, made of different materials, some of which are waterproof with GTX, the inner lining is silver fiber with temperature control and deodorization, the outer layer is brushed with splash-proof treatment, and the neck is brushed with thin check, which can accommodate the collar. It is exclusively produced by 180s company. The biggest feature is that the sleeves of the first generation are red.