The answer to our light-block prayers?

These guys http://www.weedguardplus.com
claim to offer a material that is 100% opaque (blocks light) yet allows air to pass through.

I called them and asked if it blocks ALL light, I told them I wanted to use it in a photography dark room. They assured me that it blocks ALL light.

I ordered a roll, I guess we'll find out.

hmm interesting haha

any news on how well it works?

I read on the page that it's biodegradeable. Is it working beter than regular black visqueen?