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You’ll want to pack Gore-Tex for both destinations.

Operating an outdoor apparel business in the city that invented Gore-Tex created pressure to embrace technical outerwear.

They continued slowly until, at about 13,500 feet, they decided to take an hourlong nap in the middle of the night, huddled together with just their parkas and Gore-Tex layers for warmth.

They have been used in brands such as Stainmaster, Scotchgard, Teflon, Gore-Tex, and Tyvek, according to the environmental department.

Check the ingredients on products you buy and watch for chemical names containing "fluor-." Specific trade names, such as Teflon and Gore-Tex, are also likely to contain PFAS.