The long wrist cuffs are terrific. Absolutely terrific.

However, these mittens are NOT waterproof. Not even close. On our first day out skiing, it was raining out so the kids hands got pretty wet, through the gloves. Both kids have shells that we cinched around the glove, so the water wasn't running in from the wrist. Worse still, they don't dry out thoroughly without turning them inside out.

These gloves would likely be great somewhere the snow is dry, like Utah or Colorado. Here in the Pacific Northwest, they're not so good.