Castelli Nano Flex 3G Knee Brace BlackCastelli Nano Flex 3G knee pads are great in dry conditions, but they also offer extra protection and warmth on wet rides. Castelli Nano Flex 3G Knee Brace BlackCastelli Nano Flex 3G knee pads are great in dry conditions, but they also offer extra protection and warmth on wet rides.Characteristics:- Water-repellent and breathable Nano Flex thermal fabric.- Flat seams - Double-sided silicone clips to hold the garment in place.- Temperature range: 12º / 20º C.- Weight: 89 g (Pair).Technologies :- Nano Flex 3G: Features a nanotech topical water repellent mechanical microfilament finish combined with a short chain chemical DWR finish for class leading water repellency. The third generation of Nano Flex fabric is based on a new thermal fabric with a tighter weave to improve protection against water.Reference: 4519578010