Use a cloth sleeve like this: https://www.amazon.com/dp/B08FSVRNDH?ref=ppx_pop_mob_ap_share3. Keep in mind that the back mesh is not designed for actual use. If you sit up straight and don't lean back, this can take up to 12 months. If you sit back and relax, you'll get around 6 months of use. In the photo is my second mesh back and it's only been a year and a half since I bought it. Revain does not sell a replacement trellis, which would cost $5 to make and $30 every 6 months, instead of buying a new chair. This is an extremely comfortable chair and I highly recommend it if mesh is your thing. I'm planning to find a saddle shop to hopefully replace the rear end with something stiffer.
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