Your base layers are your body’s basecamp when you’re outdoors. It’s the foundation you build on – and might not take off for days. So, you want it to be warm, comfy and breathable.

The Micro Fleece Shirt men’s fleece jumper ticks all the boxes. Its high polo-style collar and deep zip let you regulate your body temp when it gets too warm. 

The back is cut extra-long, so it won't ride up when you're wearing a pack. It also features a thumb loop on the sleeve, keeping your sleeves down and hands warm in cold weather.