3D VALVE for covid mask to reduce temperature in the mask 3D print model

This valve is made for 3d covid masks. The temperature in the mask is often too high and not confortable. So I made a breath out valve to remove the hot air in the mask.

There is a membrane which blocks the input air ( breath in ) and moves during beathing out so the air can flow through the 3 openings.

For 3d printing I used flex material. This is needed for the flexible membrane.