Almost all outerwear will state waterproof / breathable ratings usually on the swing tag. The higher the no. the more waterproof and breathable the garment will be. Also check seam sealing (or taping) – fully taped is better for keeping out water and wind. Clothes can be shells or insulated (warmer) but most of the warmth should come from your mid layer. We call the outerwear your weather layer not your warm layer.