Furry cap, coat, leggings, and boots

Recently, while playing with my friend, I froze to death. That made me think "shouldn't there be a way to stop this, or at least slow it down?" So I thought up the idea of the furry cap, coat, leggings, and boots. The recipe for each would be the corresponding piece of leather armor, with a wool (any color) above it. The new armor would offer the same protection as leather, only the cap would slow death by freezing 10%, the coat 20%, the leggings 15%, and the boots 15%.