Coolnet UV Buff products offer excellent protection from the sun, as well as a cooling effect. - 95% polyester and 5% elastane- UPF 50+ - Polygiene treatment: based on silver ions, this treatment has antimicrobial characteristics and helps prevent odors - Meets Oeko-Tex Standard 100 requirements for garments worn directly on the skin - Made in Spain The factory has an ISO14001 environmental certificate and SGE 21 certificate for ethical and social responsibility. The electricity used in production is made with renewable sources.