The summer suit solves a specific problem that regular suiting doesn’t which is how to look properly dressed when the temperature has risen to the point where wool feels like a punishment. The answer is fabric and weight. Linen has the most breathability but creases enthusiastically. Cotton and cotton blends are more crease resistant and still significantly cooler than wool. Fresco weaves in lightweight wool offer the best of both worlds if you can stretch to them but they’re a more specialist purchase. Beyond fabric the summer suit tends to work better in lighter colours than winter suiting. Stone beige cream mid blue and lighter greys all work in a way that feels appropriate to the season. A summer suit in a lighter colour with a linen or cotton shirt and loafers is the warm weather formal look that requires the least effort to pull off convincingly and rewards the least amount of overthinking.