The Nano Flex 3G fabric is the result of a decade of development. It's Castelli's best all-around fabric for winter tights: warm, stretchy, luxuriously soft, highly breathable and on top of that it features their proprietary third generation of nanotechnology water-repellent finish. While other companies are using simple chemical water-repellent finishes, Castelli created a nanotechnology mechanical repellency to enhance a chemical DWR finish. You stay drier and more comfortable.
Even though this tight features their latest water-repellency technology, don't think of it as just a niche rain tight. The fabric makes for a great dry-weather tight, and the reduced-seam anatomical cut makes it extremely comfortable. They use the pro-level KISS Air2 seat pad along with a mesh bib and zippered ankles.

• The bibknicker that's great in every possible condition
• New Nano Flex 3G fabric is exceptionally warm and soft yet with even better rain protection
• Reduced seaming for improved comfort and fit
• Mesh bib straps don't hold moisture
• KISS Air2 seat pad for long-distance comfort
• Embossed logos for durability
• 4-16°C / 39°-61°F
• Weight: 278 g