What is the difference between crystal stockings and corespun stockings, which are thinner and more durable?

Crystal stockings are stockings made of crystal silk, not very strong, hook a silk, the whole stocking basically can not be used again.

Core silk is nylon silk coated or coiled in spandex to form spandex core silk, with core silk knitted stockings, in addition to the soft characteristics of nylon silk, but also has the advantages of spandex high elasticity. The core silk has high transparency and excellent elasticity, completely overcoming the defects of nylon and crystal silk, with a delicate and smooth handfeel, belonging to the current mainstream products. Core stockings produced by different manufacturers in the quality and price there is a big difference, generally to the degree of tightly woven for the top grade, loosely woven degree of poorer.