I have been using steel blue zip sided 152's the last 2 times. Got a free pair off a mate first, as he thought they rubbed on his toe, I did not notice that. Simple zip entry which is great if you go in for a cuppa. Never use the laces except when they get loose. They are very comfy right to the end and last around 18 months. I wear bamboo socks in summer as they are a little cooler and thick socks in winter.