The Jeans with RED TAB are made in 7-Line fabrik.
Levis 501 Red Tab - Shrink to Fit, Levis 511 Red Tab - Slimfit, Levis 512 Red Tab - Slimfit and Levis 505 Red Tab (similar to 501, except with a zipper) the the best for swimming and diving. All of these are hydrodynamic - narrow - slim leg, close fit elsewhere and draw-up for good athletic support. These offer the same protection as a 1mm wet suit. Add a neoprene or rash guard top for the famous "Top & Levis". Great with dive boots and fins for protection in open water against cuts, scrapes and stings.
Levis
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The main difference between the Levi's Silver Tab and Red tab jeans is simply style. The silver tab jeans look better when paired with dressier tops, while the red tab jeans are for more casual wear.
You can tell the age of Levis by the way they are made. For example, the red tag wasn't placed on the jeans until 1936. Another example is that 501 Blues, were not created until 1984.
Patrick Levis's birth name is Levis, Patrick Cannon.
Levis Levis
The 501s are Levis classic style of jeans. They are what people typically think of when they think Levis.
Tab colors on Levi's jeans is a branding tool that refers to the type of denim used. In modern Levi's, red tabs are used on conventional denim and silver tabs are used when the denim has "stretch", both for close-fit or relaxed-fit. The original "red tab" was used on 501 jeans starting in the 30's to point out that they were made from a 10-ounce custom denim and were derived from its red selvage (the threads that run off the sides of a bolt of cloth that are woven in an edge strip to keep it from unraveling). In the 70's/80's/90's there was also an orange tab for a lighter weight conventional denim. I've heard people say there was a yellow tab for a while too, but I don't know anything about it.
Ashley Levis is 5' 3".
Gasteropelecus levis was created in 1909.
Dupontia levis was created in 1908.