The Castelli Tutto Nano Bib-Tight handles it all: rain, cold, sweat. The soft, brushed interior fabric keeps you comfortably warm. The highly breathable layer of the fabric wicks sweat, yet amazingly the waterproof treatment causes rain drops to roll off. The material of the Nano Bib-Tight stays dry on the inside and outside. The Nano Flex 3G fabric is a very dense fabric that won’t absorb water, yet it’s still breathable enough to let body moisture escape. For additional rain protection, the treatment on top of the fabric repels water so it will roll off. Furthermore, even the mesh bib straps won’t absorb moisture. These are the bib-knickers to ride in when it’s raining. The big-knicker’s are further enhanced by minimal seams which, combined with the soft fabric, will make you feel extremely comfortable. The seat pad is also designed to keep you comfortable on long distances thanks to its multilayered padding that has the thickest layers under the ischial zone, the most sensitive part of the seat. It thins to a middle thickness under the perineum and then thinnest on the perimeter. Because the padding is tapered, the seat pad feels smooth and it conforms to the shape of a man’s body.