We have a big problem with mosquitoes here in the South. Hubby and I love to sit out in the warm weather to eat and read. I finally found an umbrella screen that fits over standard umbrellas. I found this at www.lakeside.com
Above you see the bottom which has a tube insert that you fill with water. This holds it down.
Now we can sit out any time with no pests. However, I will be curious to see how it holds up....especially the zipper you need to use to get in and out. Also it would have been much better if it was in a dark green or black. ....I feel like I am inside of a bridal vale or veil or however you spell it!!