Hello folks. I've ordered a Psolar BX Balaclava (with a heat exchanger), to use in the winter on hiking or cross country skiing trips. Mainly to use as part of the sleeping system, under a tarp or in a tent. From what I've read, it should make me sleep warmer, and as a bonus, reduce condensation in a tent.
From a UL-perspective, do you think it is worth its weight? Or would those ounces be better spent on some other clothes, more down in the sleeping bag etc?