Here's what other sites are saying:
Waterproof and breathable REI Timber Mountain mittens help keep a boy's hands toasty warm and protected from wind and water. Rugged nylon shells and waterproof/breathable inserts are windproof to 60 mph. Polyester insulation adds warmth without bulkiness; fuzzy linings add comfort and wick moisture away from the hands. Grippy, reinforced palms are stretchy and durable; thumbs sport a soft nose-wipe panel. Leashes can be removed when not in use. Gauntlets extend coverage; 1-handed closures cinch and uncinch with ease.