[Retracted] Application and Safety Performance of Nanomaterials in Clothing Design Engineering

Table 1

UPF value and protection class.

UPF range	Protection classification	Ultraviolet transmittance%	UPF grade
15–24	Better protection	6.7∼4.2	15,20
25–39	Very good protection	4.1∼2.6	25,30,35
40∼50,50＋	Excellent protection	≤2.5	40,45,50,50+