Functional underwear or thermal underwear forms the basis of your clothing choice. Your first layer of clothing should at least keep you dry. But when...
Functional underwear or thermal underwear forms the basis of your clothing choice. Your first layer of clothing should at least keep you dry. But when do you opt for extra moisture wicking and when for insulation? The material merino wool, synthetic fibres or a mix of merino with polyester or nylon largely determines your choice.