The outer layer is made of a blend of 65% polyester and 35% cotton, providing a durable barrier against external elements. The middle layer is made of 100% polypropylene, which acts as an additional filter to prevent the penetration of harmful particles.
The inner layer is crafted from a blend of 60% cotton and 40% polyester, ensuring that you stay comfortable throughout the day. Our masks feature an adjustable length band that can be customized to fit your face perfectly.
Our soft flexible material makes our masks lightweight and breathable, allowing you to wear them for extended periods without feeling uncomfortable or suffocated. The best part? Our masks are reusable and easy to clean! Simply hand wash them in warm water with detergent (no bleach), then dry flat for future use.
![High Altitude Mask - Simulate High Altitudes - for Gym, Cardio, Fitness, Running, Endurance and HIIT Training [16 Breathing Levels]](https://img.bestrinet.com/usImage/68/7e3cb6c46cd9dcd253aad52e9548128a.jpg?i7nkv60xrf)
