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Jeans are trousers made from denim. Originally work clothes, they became popular among teens starting in the 1950s. Popular brands include Levi's and Wrangler.
Jeans were invented in Genoa, Italy when that city was an independent Republic, and a naval power. The first jeans were made for the Genoese Navy because it required an all-purpose pant for its sailors that could be worn wet or dry, and whose legs could easily be rolled-up to wear swabbing the deck and for swimming. These jeans would be laundered by dragging them in large mesh nets behind the ship, and the sea water would bleach them white. The first denim came from (french:de) Nīmes, France ... hence the name denim. The French word for these pants was very similar to their word for Genoa; this is where we get the term 'jeans' today.
Jeans were developed in America in 1853, when Levi Strauss came to San Francisco to open a west coast branch of his brothers' New York dry goods business. One of Levi's customers was Jacob Davis, a tailor who frequently purchased bolts of cloth from the Levi Strauss & Co wholesale house. After one of Jacob's costumers kept purchasing cloth to reinforce torn pants, he had an idea to use copper rivets to reinforce the points of strain, such as on the pocket corners and at the base of the button fly. Jacobs did not have the required money to purchase a patent, so he wrote to Levi suggesting that they both go into business together. After Levi accepted Jacobs offer, on May 20, 1874, the two men received patent #139,121 from the United States Patent and Trademark OfficeThe United States Patent and Trademark Office PTO or USPTO is an agency in the United States Department of Commerce that provides patent and trademark protection to inventors and businesses for their inventions and corporate and product identification., and the blue jean was born.
Jeans have been often compared to four-wheel drive vehicles and hiking boots, because they can go anywhere. Levis are known for their rugged construction, personal "shrink-to-fit", and versatility. Originally worn by miners, farmers, and cowboys, Levis are now worn in all walks of life.
The concept of wearing jeans in water dates from their very beginning and continues today. Levis were originally produced in only three sizes, and the wearer would jump into a body of water - either a creek, a pond, or a horse trough, to shrink them to fit. Today, Levis are available in a variety of styles, from tight to loose fit, and are sold either pre-washed or shrink-to-fit. And may never even be worn in water, if the wearer chooses not to. However, the best method of 'breaking-in' Levis remains the same ... buy them with a snug fit, wear them new, jump into a hot tub or spa -- then swim, and allow them to dry-on, for a personal fit.
Levis, when broken-in properly and shrunk-to-fit, are practical for outdoor activities, most athletics, and aquatics. The famous 'top and levis' -- a neoprene jacket and shrink-to-fit Levis remains one of the best skindiving and scuba suits or diveskins, offering protection from overexposure to the sun, stings, and abrasion. Levis 501, 505 and 512 Red Tab are the best styles from Levis Strauss for swimming and diving, and provide the same thermal protection as 1mm neoprene. When worn with a 2-3mm top, you can swim and dive comfortably in water 5 - 10 degress f. cooler than you normally would. Levis skins are effective in water above 68 degrees F. In water below 68 F., depending on the water athlete's tolerance to cold, a neoprene dive suit or skin should be worn to prevent hypothermia.
In addition, Levis (and Wranglers, etc.) are approximatley 1.5 pounds negatively bouyant, enabling a diver -- either on scuba or freediving, to descend underwater more easily than with an all-neoprene diveskin (which is positively bouyant, and requires lead weights to achieve the same result). This is especially important in open water and in the ocean - where salt water makes the diver more bouyant than in fresh water. The very same jeans that might feel 'heavy' to a beginner swimmer when they go into a pool, are a second skin to the experienced intrepid swimmer/diver in open water. There is no comparison in fit between street jeans and water jeans. Some swimmers and divers reserve specific pairs of jeans and diveskin jeans for the water, just as they do with their neoprene wetsuits and lycra skins. The preferred approach is to be able to go from dryland to water and back to dryland wearing the same jeans or skins always -- when on, in, or underwater. The truly aquatic see no distinction between the two, and shrink-to-fit jeans and diveskins offer the freedom to transition without extra time and preparation. In cooler weather, a "Warm Wind" - style coat can be worn over the diver's skins to wick away moisture and prevent chill.
Levis 'skins' provide swimmers and divers with additional convenience because in warm weather and climates where a complete diveskin is needed underwater, but not at the warmer surface (which might cause over-heating), the neoprene jacket can be removed and you can swim with just your jeans or with a lycra top. Most swimmers and diver combine their 'skins' with dive fins and a mask/snorkle for a very practical and functional set of swim/dive gear. The serge in the denim fabric acts as shark dendrils in that it funnels the water over the swimmer/diver's body allowing them to become hydrodynamic and swim faster underwater.