These fabric masks are made from 3 layers so meet the WHO guidance as they are.  You can also add a filter inside the layers of fabric in a slot that is designed to offer increased protection over and above the WHO minimum requirement for under 60 year olds.
 
PLEASE NOTE 2 LAYERS OF FABRIC MASKS DO NOT MEET WHO GUIDELINES
 
-100% cotton washable masks with filter slot
-Integrated pliable nose bridge to allow for a contoured and snug fit.
-Extra filters can be purchased separately
-The washable mask with filter slot has 3 layers of fabric which we already said meets the latest WHO guidelines.
-These masks can be worn without a filter, or for added protection you can put a filter inside.
-The filter element of this mask adds an additional 5 layers of protection so with the filter you will have an 8 layer system.
-The filter can be used for around 24-48 hours continuously, or around 1-2 weeks of occasional use.
-The filter element is disposable and cannot be washed.
-The mask is machine washable up to 60°C, or wash with soap then scald with boiling water for 5 minutes and leave to dry.
-This product is non-refundable for hygiene reasons.
 
*Please note, these maks have black ear loops.