Cored wire [conventional crotch]].

Core-spun silk [super elastic crotch]]

Core-spun silk [no mark T crotch]]

Core-spun silk super elastic [increase fertilizer]]

2d core-spun ultra-thin t-crotch with crotch

Three silk stockings can be cut at will [super elastic plus crotch]].

Ultra-thin high permeability plain socks [line crotch]]

Four-way velvet cut at will [super elastic crotch]]

Four-way velvet cut at will [no mark T crotch]]

Four-way arbitrary shear [increase fertilizer]]

Seamless and arbitrary cut [invisible and traceless]