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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

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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.

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