Elastane is the same as Spandex. Both are yarns that are knit/woven into fabrics, and contribute stretch and recovery properties to the fabric. Spandex is DuPontâs brand, elastane is the generic name.
In Latin 'Libra' are the symbol for the scales, hence the use of lb for weight (and lbs for the multiple),
So how do we get lb for pound and oz for ounce? Lb is an abbreviation of the Latin word libra. We got the word pound in English from the pondo part of the libra pondo but our abbreviation comes from the libra. The libra is also why the symbol for the British pound is Â£ â an L with a line through it. The Italian lira also used that symbol (with two lines through it), the word lira itself being a shortened version of libra. Ounce is related to the Latin uncia, the name for both the Roman ounce and inch units of measurement.