Castelli NanoFlex 3G Cycling Knee Warmers - Black Limited Stock which means that you can

which means that you can easily double – or triple – the burn time by simply bringing more batteries

performance tests and recovery tracking

WORKS WITH THE VARIA APP - This smartphone app helps you increase your awareness by providing graphics — plus tone and vibration alerts — that indicate the position and speed of approaching cars

fitness level and training history

SYNC YOUR DATA TO OTHER SERVICES - With Polar Flow

Castelli NanoFlex 3G Cycling Knee Warmers - Black Limited Stock which means that you canNANO FLEX ALL CONDITION WARMERS Choose Nano Flex for warmers that are great in dry conditions but also give some extra protection and warmth in wet conditions. We invented the category of water protective thermal fabrics, and Castelli's proprietary Nano Flex is often imitated but never equaled. No compromises for any conditions. Features: Water repellent thermal and breathable Nano Flex fabric Flat lock stitching with single seam Double sided silicone