Castelli Nano Flex 3G Leg Warmers
Apparel
Castelli Nano Flex 3G Leg Warmers
Castelli Nano Flex 3G Leg Warmers
The Castelli Nano Flex 3G Leg Warmers are made for cool and damp rides. Read the overview
At a glance
- Fabric
- Water-repellent Nano Flex
- Material
- 85% polyamide, 15% elastane
- Temp range
- 46 to 68°F (8 to 20°C)
- Grippers
- Double-sided silicone grippers
1 in stock
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Overview
What Makes the Castelli Nano Flex 3G Leg Warmers Stand Out?
The Castelli Nano Flex 3G Leg Warmers are made for cool and damp rides. Nano Flex fabric is thermal, breathable and water-repellent. Castelli says it is warm and comfortable when it's dry, water repellent when it's damp, and still warm in extreme conditions. They use flat-lock stitching with a single seam, and double-sided silicone grippers help keep them in place.
They're made from 85% polyamide and 15% elastane. Castelli lists them for road and gravel riding, rates them for 46 to 68°F (8 to 20°C) and light rain, and makes them as a unisex warmer in sizes S, M, L and XL.
All the specs
- Fabric
- Nano Flex, thermal, breathable and water-repellent
- Material
- 85% polyamide, 15% elastane
- Gripper
- Double-sided silicone grippers
- Sizing
- S, M, L, XL
- Use
- Road and gravel
- Temperature
- 46 to 68°F (8 to 20°C)
FAQ
Good questions
Get to know Castelli

There's more to Castelli than this one product. Our Castelli page has the full Castelli lineup we carry and more about the brand.
Visit the Castelli page →Will these stay up on long climbs without rolling down?
Castelli uses double-sided silicone grippers to keep the warmers in place.
What temperature range do the Nano Flex 3G warmers cover?
Castelli rates them for 46 to 68°F (8 to 20°C). Nano Flex fabric is thermal, breathable and water-repellent, and Castelli rates its water protection for light rain.
Are they unisex?
Yes. Castelli lists the Nano Flex 3G Legwarmer as a unisex warmer, in sizes S, M, L and XL.
Reviews
What riders say about the Lab
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