The most important function of these casual jumpers is to keep you warm on cool summer evenings when you wear them as a top layer and in winter as a mid-layer directly under your jacket. Classic cotton sweatshirts aren’t the best option for hard physical activity, so look out for a more ‘technical’ moisture-wicking fabric. You’ll also see zipped sweatshirts among our selection. We’ve got all your favourite outdoor brands – get a great sweatshirt to complete your look today.