As for what you wear, it should be light and technical. However, you’ll need to adapt the warmth of your clothes according to the level of effort you put in.
The three-layer rule applies: a breathable technical base layer, a second insulating layer for warmth, and a third windproof layer.
Your trousers should be waterproof and fit close to the body for easy movement.
In walking mode, cover up more than in sports mode, when you’ll quickly start perspiring.
Remember to protect your extremities with a light hat, suitable gloves and warm, breathable socks.
Finally, remember to take with you a water bottle, sunscreen and sunglasses, or even a small backpack with a cereal bar