I ski a lot, and I’ve been really happy with Patagonia and Arcteryx, as others have mentioned. My husband and I have both had Arcteryx warranty replacements for items (hard shell jacket and ski pants) and were reasonably happy with the process. The problem is the warranty process takes a long time. In my case, the waterproofing on the seam of the seat of my snow pants failed. But it takes them like 6 weeks to process it, and since it was my only pair of snow pants I basically just dealt with a wet seat until the season ended to send them in. Not ideal, but they did send me a new pair.

While it might not be “warranty”, I’ve also had excellent luck getting stuff repaired with Arcteryx and North Face. Repair jobs were <$100 and saved the item (one item was accidentally too close to a stove and caught on fire, another was a big puncture hole).

I just want to throw out there too that taking good care of your stuff really extends the life. Gear is meant to used so don’t treat it precious, but stuff like gortex is meant to be washed more frequently than you’d think, and this often refreshes the waterproof membrane and helps seams from delaminating. There’s lots of great videos on caring for your outerwear out there.