A winter jacket should be close enough to hold in warmth, but with room for a jumper or mid-layer underneath. Try zipping it up and reaching both arms forward — it should not feel tight across the back or shoulders. Fits and lengths vary between styles, so check the size guide and the reviews on each product page, where customers share their height and the size they chose. Allow a little extra room if you plan to wear thick layers underneath.

The more you move, the less insulation you need, because your body makes its own heat. For high-effort activities like hiking uphill or skiing, a lighter, breathable jacket stops you overheating. For standing still — watching, waiting, or at camp — a warmer, heavier jacket keeps the cold out. If in doubt, a mid-weight jacket with an adjustable hood and zips gives you the most flexibility.

Yes. Lighter down and insulated jackets work well on their own in mild cold, or as a warm middle layer under a waterproof shell when the weather turns. This is a good way to stay warm and dry in wet conditions, and it lets you adjust your warmth by adding or removing the layer.