When your kid is so active they're always on the move and a full jacket is too hot, the Patagonia Down Sweater Vest is the key to core warmth without the bulk and arm restriction limits of the former. NetPlus® 100% Recycled Nylon with high-end 700 Fill-Power Recycled Down is about as good as you'll find in a kid's garment, and this one will last for multiple siblings.