Don't be fooled by the name, as you would guess the Ventilator V is, at heart, a mesh jacket and jean perfect for hot summer days. But to match the full range of conditions the British weather can throw at you (we know you can't trust the weather man) We've given the Ventilator the 4 season treatment, with 4 separate set-ups. When we say 4 set-ups for 4 seasons we really mean it. 1: outer+waterproof+thermal (Winter) 2: outer+waterproof (Autumn) 3: outer+thermal (Spring) 4: outer (Summer) Truly a jacket for all occasions.