>>1726919The principle (of keeping the insulation dry with a waterproof barrier) is also used with vapor barrier liners, which protect insulation from body moisture. They are most often used in boots, but also in sleeping bags in very cold weather. As you kindly pointed out already, closed foam insulation is mostly used in sleeping pads, but also watersports apparel and some kinds of boots. For most other applications, it is both too heavy and lacks breathability.
