A base layer is a versatile garment that you can use for many activities all year round; skiing, running, hiking and outdoor activities. At Outnorth there are base layers in many different models and colors to choose from. To find the right base layer for the right activity, you can look out for the material weight in g/m2, this is a measure of how thick the material is. A base layer with a material weight of around 100 g/m2 is thin, which is suitable for training or hiking in summer, and a base around 200 g/m2 is thicker and thus suitable for activities in colder weather.