A pot holder set must obviously protect the cook's hand from the heat of the oven. There are two kinds of cotton pot holders: those that are only quilted and those that contain an additional isothermal layer. The former are used with quilted gloves of the same thickness.
This superposition of layers of quilted fabric provides high performance insulation associated with easier grip. Indeed, the gestures are easier in a thin glove. Another advantage is to be able to slip the potholders as a trivet mat when you hold a hot dish. It's handy when you forgot to install the trivet mat, and it happens all the time!
If you prefer potholders and insulated kitchen gloves (thicker), you can dig into the collections of Marat d'Avignon®.