I don't know if I got a defective product, but every time I take Pyrex out of the oven with these specific gloves, they leave a small black residue on it.

I just want to note that the gloves have a particularly long length... 38 centimeters... I don't know if it was mentioned somewhere, but I hadn't seen it in the specifications provided by the e-shop. This makes them particularly safe so you don't burn yourself on the pole. The only problem is that they were too bulky for storage and I had to return them. The gloves look great, but I didn't use them for this reason. I'll give them 5 stars so as not to unfairly lower their overall rating.