I've done quite a bit of research on these because we HAVE to be careful in the sun. I have an umbrella like this..................
UV Sun Blocker
UV-Blocker umbrellas are very stable in high winds, are very durable, yet easy to carry and maneuver. The Beach umbrella uses the #1 Patented Vented Mesh System which allows wind to pass between the upper and lower canopies. This system prevents inversion.
Then, this is my absolute favorite.
Instant Sun Shelter
Click on the other picture with the door open too. It fits about 3 people. Nice part is my nephews can nap in it and stay cool. The windows open on the side for breeze. You put sand in the sides and that tent isn't going anywhere.
It opens and closes up really easy. Very well made. I've had mine for years now and it still looks brand new. Also, if it is windy out, I use as a wind block and everyone sits in front of it. It turns an annoying sand blast day at the beach into a good beach day.
Did I happen to say I love my shelter and my umbrella?