SURPRISINGLY USEFULIts aero for time trials. Its windproof for cool days. The fabric is waterproof so it keeps road splash at bay. We like this product for all but truly cold conditions because its good at everything. Windproof to keep the cold off? Yep. Waterproof fabric? Yep. Super aerodynamic for time trials? Got that one too. So its good for everything but were tired of the you could wear that to the disco jokes. It wasnt that funny the first time we heard it. Aerodynamicgreat for time trials Silcone-coated Lycra® keeps out wind cold & rain Heavy-duty zipper