I was given a splint from my doctor, but I have big muscular calves so it didn't work (as soon as my foot went flat and I tightened it on my calf, my heel would raise a few inches). I ordered one like you are currently using, and I only do an hour on each foot a night. It causes my toes to go numb, which annoys me. But looked really hard at this one https://www.amazon.com/dp/B01G5S4XIK/ref=cm_sw_r_cp_apa_glt_fabc_K232THNBMSX564Y4769S
I still have it in my cart, because I will probably get it at some point. So while I can't say it is a good one, it might be a style to check out.
I got this one from Amazon and it does it’s job. I had to cut off the grippy part on the bottom or else it was a pain to wear in bed. I don’t like the lack of ventilation though my feet get hot whenever I wear it but it’s not awful.
FWIW I’ve bought many a PF boot but this one is the only one I can actually keep on through out the night. (Usually my foot falls asleep and I have to rip it off in the middle of the night.) BraceAbility Plantar Fasciitis Night Sock | Soft Stretching Boot Splint for Sleeping, Achilles Tendonitis Foot Support Brace & Heel Pain Relief Compression Sleeve (Medium) https://www.amazon.com/dp/B01G5S4XIK/ref=cm_sw_r_cp_api_glt_fabc_WQMCNMJNQXT5030GTVQ9?_encoding=UTF8&psc=1