I have used Wallowaters mini green house tomato protectors in the past for cool wet weather.
I think the product might be better over tomato cages. Wallo Waters do not work with cages. And often injure plants when removed.
I just ordered to use over my tomato cages and will update how effective they are.
2019 Lyons / Longboat June weather predictions look cooler and wetter overall. Very hard on tomatoes.
I will use these at night if below 60 degrees and raise them off plants if over 50 degrees during the day.
1 package covers up to 7 tomato cages. I think it will work just fine with the square cages I have. We'll see! Have ordered with Amazon Prime so will have them by wed and will report if they work with my square cages.
Can purchase on Amazon. $12.98 for enough for up to 7 cages. Comes in a tube like roll to custom cut.