Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: I bake at 475, with heavy cast iron Dutch ovens, and need gloves that resist the heat and will allow me to remove the oven lids. How will these work?
Document: I bought these after my old cooking mitts left a burn on my hand shaped just like the handle of the Lodge cast iron dutch oven I bought on Amazon and then proceeded to bake bread at 450 degrees in the oven with. Heavy dutch oven + very high temp + searing pain = recipe for disaster. These still transfer heat but I can safely handle very hot cast iron with them without having to rush against a burn. No regrets about this purchase.
We use these for baking in a 475 degree oven, they work fine, give me lots of handling time with heavy Dutch ovens, have a good grip, too. I was a little nervous, asked a question about whether they'd work at the very high temperature, got mixed reports. I'm happy to say that 475 is not a problem. These are much better than the welding gloves I used to use.
I have been making no-knead bread from Jim Lahey's recipe, which requires heating a dutch oven in a 475 degree oven. These gloves let me remove the lid and deal with the bread safely.
These say they are rated to 350 or 400 but I pull out my cast iron dutch oven a few times that was rocking near 500 and had not sensation of heat.....They are a tad big other then that 5 stars
I got tired of washing my cloth mitts and they still looked stained, plus when wet they were a steamy hazard. These mitts wipe up clean and take the heat. I use a lot of cast iron pans which need to be hot, hot, hot. These mitts are up to the task. Great....highly recommend.
These keep my hands nice and comfortable when working with things from the oven. Even heavy hot cast-iron is no match for these while moving dishes around.
These are the best kitchen gloves I  have ever used. I am forever burning my hands and wrist area when baking and these have changed my life. NO more burns. I feel no heat when removing my cast iron skillet from the oven. I am so pleased and would recommend this highly. They are easy to clean as well and the inside feels so soft and comfy to your hands. I used them at a higher temperature than stated and they worked as well. Great oven mitts!!!!
Perfect mits for cast iron or any other bake ware, no problems, hands stay cool, they don't melt or get hot or anything else that's crazy. Good size for all average hands too I'm sure!
I LOVE to bake but don't do it often because I hate the part where I have to actually remove the items from the hot oven. None of the oven mitts I have ever had ever worked for me. I don't want to still feel heat when I picking up a cookie tray!Many a time I have almost dropped a tray because I felt the heat and I grab for another oven mitt to put around the one already on my hand. I don't have to do that with these.
Man...! These cooking mitts are fantastic! I use cast iron (Lodge), stainless steel stove-top to oven cookware and general HOT-STUFF in, on and around the kitchen. These guys handle the heat without any problems! No delayed heat transfer like with other mitts or pot-holders! No "Gotcha" moments!
Answer: These will work fine.  I cook vegetables in a heavy 12" cast iron pan and it gets well above 475 in there.  I'm able to pick it up and cary it about 50' from the grill and put it down on my kitchen stove.  I would be more concerned about the length of the gloves...they don't cover the whole forearm so if you are reaching back in the oven you may risk getting burned closer to the elbow.