Best…breathable fabric

£59.90, sizes xxs-xxl, Uniqlo

Uniqlo are pros when it comes to high-quality wardrobe essentials and this is no exception. It has a water-repellent coating and taped seams to keep the cold out, and clever details such as the hidden underarm ventilation, keeping it fresh and breathable. It has a little stretch and adjustable poppers for the perfect fit.