I wear a lightweight Buff when it's very cold, basically to keep my neck warm, but it can be a headband, or a hat, or a balaclava. When you pull it up over your nose and mouth it warms the air you breathe in.Ginger said:Ive been finding it harder to run the past week because the air is so cold going into my lungs and i find breathing not as easy as it was. Do other people have this problem? Its not stopping me running, just a bit irratating...