Lotta misinformation in this thread trying to claim that wool doesnt keep you warm when it is wet, and I can say from first hand experience that it most certainly does keep you warm when completely soaked through. Sheep should be shorn humanely and it is possible to do, but corporations and capitalism have no incentive to do it. Here is an indepth article explaining the science behind how wool keeps you warm when wet. And Here is anothet article