The base layer Merino Wool is heat-regulating and works well when you alternate activity with rest. The wool keeps you warm when you are cold, it gives a cooling effect when you are getting hot and it is suitable all year round. Sneaky Balaclava consists of a brushed polyester that flicks moisture away well and is therefore suitable for high-intensity activities. The built-in balaclava protects against the cold in alpine environments. Hiball Waffle Baselayer is a good alternative to a wool base as the inside has a waffle pattern that traps air for outstanding insulation, this is our warmest base. Thanks to its bamboo material, Bambooskin is antibacterial and anti-odor, this base is our coolest and is suitable from spring to autumn and during mild winters.