Here's what other sites are saying:
The REI down mittens will keep your girl's hands warm and dry. They feature recycled polyester shells, waterproof inserts and goose down insulation. Recycled polyester shells are flexible yet durable; grippy palm and thumb reinforcements increase abrasion resistance. Use of recycled PET polyester helps reduce oil consumption and air emissions. Inserts are waterproof, yet breathe well to keep small hands warm and dry. REI Down mittens are insulated with high-quality goose down for warmth, light weight and compressibility. Microfleece linings wick moisture away from hands so they don't get clammy during high-energy fun in the snow. Webbing-and-buckle fastening system at the wrists secures the fit; easy-to-cinch gauntlet cuffs keep snow out and warmth in.