VIVOSUN 2-Pcs. Grow Tent Vent Cover, 4"/6"/8" Duct Filter Vent Cover with Elastic Band and Fixed Buckle for Plant Grow Tent Vent

Easy to install and it works perfectly

I previously got some other brand and they completely covered the light and blocked all air so I tried these out they don’t block all the light but has good air flow does the job keeps the bugs out

IMO vivosun is a garbage tier company. I would definitely *not* purchase lights or tents from them, but I gave these a try on a recommendation and they are the best product of it's type I have found. Most are way too small or tear easily, etc. These are generously sized and surprisingly sturdy. I was so happy with the 4" ones I received that I ordered the 6". Super unlikely source for a great product, but I'm not complaining :-)Obviously these do not provide "filtration" of anything meaningful. They are a breathable nylon mesh screen with a thicker nylon cloth cinch cuff, not a charcoal filter, and certainly not HEPA. They keep large lightweight objects from being sucked into your ducting but probably not pet hair and certainly not dust. Used for what they are useful for they are great.

I like what they’re meant for

Not to bad keeps stuff out

Definitely is doing a very good job keeping dust out my fan. Its like a sock with a drawstring takes a bit to get it over venting tube. For the price its worth it.

No hassle fit. Unlike other brands these easily fit over the vent hose. Draw string draws it tight. Other brands make you fight to get it over the vent hose. Will buy again.

pretty good feeling material. It seems like it will last long.