The UV protection factor UPF indicates the ability of the fabric to protect against UV rays. The higher the UPF value, the better the UV protection effect. The "Assessment of Textile Anti-UV Performance" standard issued by the General Administration of Quality Supervision, Inspection and Quarantine stipulates that only when the UPF value of the sample is greater than 30 and the transmittance of UVA is less than 5%, it can be called a "anti-ultraviolet product". Two conditions Indispensable.

UV-resistant nylon (20D≤denier<40DUPF30+) fabric UPF measurement value is greater than 30, and UVA transmittance is less than 5%; UV-resistant nylon (fineness>40D, UPF50+) fabric UPF measurement value is greater than 50, and UVA transmittance Less than 5%.