I’ve had a CATIO that I built myself for many years. I’ve gone through many products trying to find a substantial enough net to keep out squirrels. When a squirrel gets in, they can eat through that net in a half a second. I am so impressed with this steel reinforce netting!!! I’ve had a couple of squirrels get inside through the top opening, and they were unable to bite through the net to get out!!!! and believe me they tried… I’m very very very, very, very happy with the the steel reinforce netting and I’m so glad I went with that choice. I used a combination of zip ties you nails, and rope to construct the catio -and it looks beautiful in addition to being super effective. I also want to add I constructed this entire catio by myself. 5 feet tall and no handyman skills.😻 when there’s a will, there’s a way! Definitely don’t hesitate. I would highly highly highly recommend this product.