Layering up for the outdoors takes a bit of practise. It all starts with a good baselayer which is fitted and will insulate you properly while wicking away any moisture so that you don't get chilled to the core. Baselayers provide the foundation from which to build up your other layers like a shirt, softshell or midlayer fleece, down or synthetic jacket and waterproof hardshell. How you layer up is down to personal choice and experience. Get to know your body in your favourite activities but start with a quality baselayer either in synthetic fabrics like polyester or natural fibers like Merino wool.