Nikwax Washing & Proofing - Look after your performance foul weather Castelli cycle clothing by washing and reproofing with Nikwax products. Breathable and Waterproof fabrics need to be kept clean not just from visible dirt but also from the almost invisible salt and minerals you sweat out during exercise. These salts block the waterproof/windproof membranes of your technical clothing reducing the ability for them to 'breath' and making the outer surface wet out. Tech wash cleans away dirt and unblocks breathable membranes to give as good as new performance. While TX-Direct (this is a DWR retreatment) restores the garments ability to bead and shed water. Use both for restoring a soggy Gabba or a damp Tempesta.