Castelli Nanoflex

Castelli’s Nano Flex treatment comprises a topical nanotechnology microfilament mechanical water repellent finish combined with a short chain chemical DWR finish for class leading water repellency.

The proprietary 3rd generation of Nano Flex fabric is based on a new thermal fabric with a tighter knit for improved water protection.

More comfortable, warmer, softer, drier and stretchier.