On a windy ride in the fall and spring, wear the lightweight Castelli Aria Vest to protect your core from chilly wind. Wind will not penetrate the ultralight windproof woven microfiber front while the mesh at the sides allows air to circulate which keeps you from overheating. The stretchy fabric will fit closely over your Castelli jersey. The Aria Vest fits like a second skin so no vest flaps in the wind and no wind can penetrate to affect your comfort zone. A rear pocket with reflective piping provides food storage and visibility when it’s overcast. When you need to store the vest, it folds up neatly into a small packet that you can easily store in your rear jersey pocket.