Every kitchen has the story: the mitt was fine yesterday, and today it scalded someone through two layers. The mitt did not change. Its water content did.
How a mitt actually insulates
Quilted batting is mostly air held still between fibres. Still air is a terrible heat conductor, which is the entire trick.
The fabric is just the container. The air is the mitt.
What dampness does
Water replaces the trapped air, and water conducts heat about twenty times better. The insulation is simply gone, though the mitt looks identical.
Worse: against a hot handle, that water flashes to steam — and steam delivers its heat into skin on contact, faster than a grip reflex can open.
Why this is the common burn
Mitts live next to sinks, wipe spills, and grab steaming pot handles. A working mitt is damp by the middle of any honest session.
So the label rating — measured dry — describes a mitt that stopped existing an hour ago. The burn arrives with full confidence in it.
The two honest answers
Keep cotton mitts genuinely dry — a second pair rotating on the hook is the cheap fix at home.
Or buy the shell water cannot enter: silicone beads it off and keeps the rating beside any sink. That is not an upsell; it is matching the tool to where it hangs.