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),
Answer: Have you ever wondered why we use the symbol 'lb' for the 'pounds' unit? 'pound' is short for 'pound weight' which was libra pondo in Latin. The libra part meant both weight or balance scales.