Tri-fold mailers...what works best?

[Exact Rototilling]

I'm doing tri-fold snow flyers for my no solicitation market areas. What works best folding and sealing wise so fewer get torn up in the postal sorting machines.

I'm assuming it's regular 1st class postage. :waving:

[ED'S LAWNCARE]

I've sent some tri-folds out before I used little stickers that you can get at walmart where they sell post it's. You can get 1k for a couple bucks. I also stapled them never had a complaint from postal service.