The original Fawesome vest--which is basically a Gabba without sleeves and pockets--only has one identifiable flaw: the name is... questionable, at best. That's just one of the areas where Castelli found room for improvement with the Perfetto Men's Vest, and anyone who's spent time in the Fawesome will be surprised to learn that, yes, Castelli did actually manage to improve the vest. These improvements include an improved water-resistant treatment and the much appreciated addition of two rear pockets. While we appreciate the material update, the pockets make the Perfetto Vest a far more versatile option by providing the storage options that the Fawesome never did. The Perfetto isn't an indulgence, it's an investment that upgrades your entire wardrobe. The Perfetto Vest rocks the same Windstopper X-Lite Plus fabric on the front and shoulders as the rest of the Perfetto line, which places the most protection where body meets wind. Windstopper X-Lite Plus has 1. 4 billion impossibly small pores per square-inch that guard your microclimate jealously. They don't let wind or rain in, but they do let water vapor out. And when the marketing materials claim this fabric is windproof, you can actually believe them. A given material's wind resistance is measurable in a rating called CFM, which stands for cubic feet per minute, used to measure the volume of air that passes through a fabric in, you guessed it, one minute. In order to be considered truly "windproof," a fabric must register a CFM of equal to or less than 1. 0. All fabrics bearing Gore-Tex's Windstopper branding meet or exceed this rating, so they are literally windproof. The vest's back is made with Nano Flex Light instead of Windstopper X-Lite Plus, which is one of the only apparent variances in construction between the Perfetto Vest and the Perfetto Jersey. Nano Flex Light is a flexible, thermally insulating material that's been coated with countless nanofilaments in order to add water-resistance. It gives flex .