Men's and Women's Altitude Base Layer Collection

The Altitude Collection is where it all started for ioMerino and includes some of our all-time best sellers like to Women's Altitude Crew and the Men's Altitude Zip. Originally designed for snow and on-mountain sports, this range quickly become our jack-of-all-trades, go-to thermal base layer. The Altitude Range is the perfect lightweight thermal layer for core warmth when you’re layering up, yet versatile enough to be worn on its own in milder conditions.

All Altitude layers are designed to be longer in the body to tuck into your outer layers or sit over bottom layer so you don’t have exposed cold spots when you’re on the go. Ideal for bike riding where you’re bending over and you don’t want your top to ride up, and on mountain sports to avoid any exposed skin.