I would get them a ski jacket, and then just a full zip hoodie or fleece. IME as the mom of two teen boys, they almost never wear a jacket except hoodies, so the warm jacket I get them for skiing can be of a bulkier nature (otherwise, I’d get them patagonia nano jackets since those are warm and no bulk- but not waterproof for skiing).

I'd look at Lands End, especially with the sale they have going on. If it's for skiing, the key is adequate layering rather than your main jacket.

North face

Boys ages 10 and 11 need new jackets. They requested “not bulky” but they need to be very warm for skiing and other activities. Suggestions?