3 layers of cottons with an insert for a filter. Attached by long elastic strings (instead of ear loops) to make wearing it comfortable for a longer period of time. The 2 strings can be adjusted to make your fit comfortable.
Measured 7 inches (17.5cm) across by 4 inches (10cm) - at the widest part when unfolded.
Cotton fabric. Can be washed at 60C and ironed.
Whilst we try to depict the colour accurately, the actual colour may be different on your screen due to camera lighting or your computer settings.