The Spyder Traverse GORE-TEX Gloves might be the most waterproof kids' gloves ever. Not only do they have the impenetrable GORE-TEX membrane, their fabric has an additional 10K waterproofing. On top of that is a Spylon DWR that sheds water off the surface. The Traverse Glove is super durable so he can play hard, and it's warmly insulated with Thinsulate. Thinsulate is light and low-profile so his gloves won't be as bulky as others.