In winter you should be wearing a mid-layer over your technical base-layer. A mid-layer come in all shapes and sizes. A fleece is a mid-layer. As is a jacket containing hollow-form fibres. Heavier Merino makes for a brilliant mid-layer. And then there’s our favourite, a down jacket. A down jacket is a great insulator, but a down jacket makes any motorcycle jacket more comfortable. And it works just as well off the bike as on it.