One of the most common misunderstandings about cooling blankets is what cold actually means in this context. A cooling blanket does not get cold the way an ice pack does. Here is what actually happens when you pull one over you.
What Cooling Blankets Actually Do
A cooling blanket draws heat away from your skin rather than adding cold to it. The fabric has high thermal conductivity meaning heat transfers from your warm skin into the fabric and dissipates outward. The blanket feels cool because it is absorbing your body heat rapidly, not because it is generating cold from within. Think of it like a heat sink rather than a refrigerator.
What Temperature Drop to Expect on Contact
The skin temperature drop on contact with a high Q-Max cooling blanket is typically 2-5 degrees Celsius in the first few seconds. This is the cool-to-the-touch sensation you feel when you first pull the blanket over you. Over the course of the night a quality nylon cooling blanket continues drawing heat away continuously, preventing the heat buildup that wakes hot sleepers at 2-4am.
It Will Not Feel Like Air Conditioning
A cooling blanket does not refrigerate your bed. If your room is 30 degrees a cooling blanket will not make you feel cold. It will make you feel significantly less hot which for most hot sleepers is the actual goal. It works best as part of a cool sleep environment at around 18-20 degrees room temperature.
The Bottom Line
The benefit is not feeling cold. The benefit is not overheating. Sleeping through the night without waking up drenched and exhausted. The Stillwell Cloud has a Q-Max of 0.40, cool on contact, both sides, all night. See The Cloud here.