Your next to skin layer needs to perform comfortably over a wide range of temperatures and conditions, your first layer in comfort has to work to keep help keep you warm when it is cool, and cool when it is warm. It needs to work on its own or as part of a layering system.
Long sleeve or short sleeve? Additional venting? Silicone reinforcements on shoulders for when wearing a pack? All of our light, comfortable, highly breathable tops offer you features that improve comfort.
Choose a top that has the features and the colour that suits you best.