Anti-bacterial 3-layer face masks are fully machine washable, for ongoing wear. The comfortable fabric and elasticated fit make them suitable for most wearers. The layers include a 100% cotton layer against your face for comfort; an anti-bacterial cotton filter layer in the middle that cleans the air; and a 95% polyester and 5% cotton outer. Outstanding anti-bacterial protection tested at greater than 98% effectiveness. Protect against bacteria and virus transmission. Machine washable - each mask can endure 100 wash cycles before effectiveness reduces. Each pack.