From the softest long-sleeves to the best hiking socks, here’s everything you need to stock your travel wardrobe.

Those base layers can include thermal underwear, also known as long johns ... XS-3XL These 100% Merino wool bottoms from Smartwool come recommended by Clower. They have a slim fit that hugs ...

But Ortovox and Minus33 aren’t the only brands tapping into the power of wool. Smartwool began sourcing Merino fibers in 1994. Icebreaker was founded in New Zealand in 1995 based on natural ...