Education. Don't dip your hands!
I often hear from walrus and people who "educate" how to walrus should say: Don't get your hands wet, because it's their hands that cool us down the most. It's a myth that is duplicated from "advanced" walrus for novices.
Maybe I'll surprise you, but hands and feet don't let us cool down. Warmth "escapes" from the body the most through the chest. The head, especially as we wet. Through large blood vessels that are close to the skin and do not shrink. So the "prisoner" position cools us down more than when our "armpits are closed". It is the balance of position/posture in icy water that is crucial during the speed of cooling the body.
On the other hand, hands and feet react the fastest (feel the local cooling), because, the body has priorities with which it protects us. For our survival in cold water, the central temperature of the body is important, while the temperature of the limbs (including blood in the limbs) especially of hands and feet is not key in survival mechanisms.
Another defensive thesis, we do not wet our hands and put neoprene on our feet because they hurt. Partly pain is the torch of the "rebellion" of our psyche. Pain is usually effective and easily blows us out of the water. We start to focus on discomfort, pain which causes us to multiply the amount of pain we feel. Especially pain is more annoying, as we enter hot (after warming up) or in the summer. Enlarged blood vessels shrinking due to centralization of circulation causing more pain. Sometimes it is worth to cool your feet before entering (standing for a while on the ground, snow, ice). Spend less time in the water. I will quote a quote from the movie "People of Cold Water - Strength of the Mind", Kris Drozd "Where there is discomfort, there is development." There is no development in comfort.
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