I was reluctant to write about these, I thought that ALL brands had their problems until I tried these (yeah i know these are no names or cheapies!) but I grade these by the “static electricity” between sheets while I’m working with them. I have OTHER brands that I’ve bought that were also 3mil, and I had to resort to using drier softener sheets to keep the static down while separating them ( which btw works pretty darn good), then I have my name brand that rhyms with BOTCH... I thought these were the best, very little static while using them or at least minimal... then I opened this pack of Nuova Premium Thermals... just to see or keep my “on hands” consumptions equal (I keep about 1K of sheets on hand), so I checked them out. Well i read about others who complain about the thickness, I say “read the package and maybe check the heater on your laminator... too hot can make for ripple and humps, And so I measure my lam sheets “side for side” So heres the technical stuff... before heat sealed (each side = 0.0025~0.003” - thats 0.0060” combined) this folks is 3 mil laminate sheets” (6 mil ~ 0.0055” laminated) btw 1 mil = 0.001” while 2 mil = 0.002” and 3 mil = 0.003” and so on. (1 mil is exactly 1 x 10-3 inches. In SI units 1 mil is 2.54 x 10-5 meters.). So I have to say that with these I’m ⭐️⭐️⭐️⭐️⭐️ rating them. No static, nice and clear, seal great and not too stiff like 5 Mils. I will say that I use a high volume 12+” wide sealer and it can run at “higher speeds” so I do WATCH MY HEAT level of the 3 mil sheets and I always let them cool just for a long second on the exit tray. My grandson scribbles on these type of sheets with crayons and markers and it’s absolutely no problem... well depending on the “build up” this can produce it to smear for a minute. Overall I feel this brand so far is my “best of the best”, again ⭐️⭐️⭐️⭐️⭐️.