The technical contents mainly include: specification and size tolerances, raw materials, appearance, physical and chemical properties (fiber content, formaldehyde content, pH value, odor, decomposable carcinogenic aromatic amine dyes, color fastness to soaping, color fastness to dry cleaning, friction resistance Color fastness, color fastness to light, color fastness to water, appearance after washing, UV protection performance, burning performance, residual metal needles)