When you are in the outdoors things tend to change quite quickly, if could be fine and sunny one minute and then chaos the next.
It is important that both you and your gear are adaptable and can change to suit the conditions so that you don't get caught out in the cold.
Warmth is about layers and the benefit of layering is that you don't have to carry bulky jackets and trousers that you will struggle to fit in your backpack when the weather heats up a little or you do enough to work up a little sweat when you are doing things around the camp-site.
Layering is important because it allows you to regulate your body temperature and avoid dangerous conditions like hypothermia.
For example, if you're camping in the snow and chopping wood the sweat that can build up while you're working may freeze and become dangerous to you.
The benefits of wearing layers is that you can take them on or off as required.
The best camping gear to bring in cooler conditions will have to be adaptable and more importantly convenient to carry so you will actually take it along on your trip.
For clothing, one of the best things to pack is a set of thermal underwear.
These are extremely light, dry quickly and wick moisture away from your body so you wont be walking around in your own sweat for the day.
Many cave divers wear thermals under their clothes to keep the water touching their skin at a higher temperature.
Thermals allow you to save money on bulkier items including the clothes that you wear when you're not camping.
A good fleece or down jacket are the next items that you should consider bringing along.
These are extremely warm for their weight and the down jackets can be packed into a small bag and used as a pillow or cushion.
These jackets can easily fit under a soft shell or raincoat and are ideal for travel.
Fleece jackets need to be treated with some care as most of them are synthetic they can easily catch fire so be sure to keep your distance when you are roasting your marshmallows.