Bulbul Reusable mask is made with fabric that is bonded with copper and lined with encapsulated natural phytoncides. This proprietary technology mask is 99.9% antimicrobial and lasts its property beyond 30 washes. While Bulbul's Copper Mask helps people fight off the spread of disease, we also want to help them look good and do their part to protect the environment. We are coming up with new innovations that make using a single-use product unnecessary while still staying protected. Our Copper face mask is designed to be reused over and over again. Every aspect of the Bulbul's copper mask has been designed and considered for sustainability. Our packaging is printed with soy ink made with sugarcane paper, a more sustainable alternative to regular paper. Sizing Guide Large Medium Small 137mm (H) x 134mm (W) 132mm (H) x 121mm (W) 115mm (H) x 106mm (W) Recomended for Children Under 10 Years Model in Picture is Wearing a Size Medium* Care Hand Wash 27°C or Below Do not Bleach Low Heat Ironing Machine Wash 27°C or below Material Industrial grade reusable textile mask that is a 2 ply layer, outer layer is a DWR water repellent layer and the inner layer is a proprietary copper infused layer with 99.94% antiviral property. Polyester 80%, Spandex 10%, Copper 10%