I contacted Gore-Tex Customer Service to inquire about how to maintain my new Mountain Hardware Typhoon jacket. I was first asked how I intended to use the jacket. I answered that I expected to carry large climbing approach loads up to 75 pounds. I was told that PacLite, the Gore-Tex laminate used in the Typhoon jacket was never intended to be used for backpacking. I was also told that this person I contacted at Gore-Tex customer service was present during the time when PacLite was first created from demands for a waterproof-breathable jacket which could fit into a one liter water bottle. PacLite was never designed, according to the man at Gore-Tex, to be worn while carrying a backpack because the thin material would quickly fail under the pressure of a backpack's shoulder straps and hip belt. He recommended I at least consider using a Gore-Tex Performance shell but for climbing and mountaineering, that I should try to buy a Gore-Tex Pro shell.