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),
1 Pounds are denoted by the sign lb. 2  This implies that there are 1/0.45359237 â 2,20462262 pounds in a kg. 3  By using the rounded value (0.45 or 2.2) instead of the exact value above you will be making an error of less than 1%.