I’ve had 45 Norths, NW arctic and now Spesh defrosters. Only the defrosters are 100% waterproof with endura singletrack trousers.
45 North zip pulls apart. There a very good fit. But you have to go a size up. I use these on the road now, great fit. Think Spring Autumn. Water gets in through the zip despite even greesing it.
NW Arctic, fine but not waterproof. Felt boxy and too large. Gaps joins let the water in
Defrosters used through last winter no issues so far, robust, dry, warm
To be 100% waterproof you need to have longs that keep the water out the tops. Endura singletrack 2 is very good