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),
The pound (abbreviation and symbol: lb) is the unit of mass in several different systems, including Imperial units, English units and United States customary units. 1 pound (lb) = 0.0714285714 stones (st) = 16 ounces (oz) = 453592.37 milligrams (mg) = 0.45359237 kilograms (kg) = 453.59237 grams (g) = 7000 grains (gr).