The Castelli Tutto Nano Bib-Knicker makes riding in the rain not so bad thanks to waterproof and super soft fabrics. The Nano Flex 3G fabric is a very dense fabric that won’t absorb water. Besides not absorbing water, the treatment on top of the fabric repels rain so water drops will roll off. Furthermore, even the mesh bib straps won’t absorb moisture. The Tutto Nano are the best bib-knickers for training in rain. While the bib-knickers are waterproof, the material is still highly breathable so on dry, warmer days the fabric wicks body sweat. On the cooler days, warmth is provided from a soft brushed interior that traps in body heat. The Castelli Bib-Knicker protects in a wide range of temperatures and weather changes. Comfort is further enhanced by minimal seams and the KISS Air² seat pad keeps you comfortable on long distance rides thanks to its multilayered padding with close to skin soft, wicking fabric.