
Best selling Cycling warmers from Castelli
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1. Castelli Arm 3 Sleeves
The UPF 50+ Light Arm 3 Sleeves from Castelli offer effective protection from the sun while keeping you pleasantly cool. These arm warmers are made from a special, extremely breathable material that prevents overheating during wear. With a UV protection factor of 50+, they protect the skin from the sun's harmful rays, while the polyester base ensures excellent moisture regulation. The silicone elasticated bands on the top ensure a secure fit so that the arm warmers stay in place even during intensive activities. Ideal for outdoor sports, these arm warmers offer both functionality and comfort.

2. Castelli Nano Flex 3G
The Nano Flex Warmers are characterized by their extremely versatile range of applications. They provide warmth like traditional warmers while also offering decent moisture protection in the rain. We were the first manufacturer to use water-repellent thermal materials for cycling clothing. Many have attempted to imitate Castelli's Nano Flex - always without success. They are uncompromising in all conditions. The water-repellent, warming, and breathable Nano Flex material features flat seams and silicone grippers on the inside and outside for a secure fit.
Pro
- Castelli quality
- Very comfortable
- Very stretchy material

3. Castelli Nano Flex
Nano Flex Warmers are characterized by their extremely versatile range of applications. They provide warming protection like classic warmers, but are primarily a decent moisture barrier in the rain. We were the first manufacturer to use water-repellent thermal materials for cycling clothing. Many have tried to imitate Castelli's Nano Flex - always without success. Uncompromising in all conditions. Water-repellent, warming, and breathable Nano Flex material. A flat seam. Silicone grippers inside and out for a good fit.

4. Castelli Pro Seamless 2 Arm Warmer
A wide temperature range combined with seamless comfort make these models our most versatile and popular warmers with professionals.
- Medium weight seamless arm warmers
- Surprisingly warm without provoking overheating
- Unique polyester/nylon/Lycra® mix (78% / 15% / 7%)
- Completely seamless fabrication
- Extra small pack size
A BETTER ARMLING
With INEOS Genadiers, we set out to develop a better seamless armling. Others on the market are made with a nylon/Lycra® blend that tends to retain moisture. But we realized we could achieve better moisture management with a polyester yarn. However, working with polyester makes it more difficult to achieve the right elasticity, shape retention and manufacturing consistency. It took a year longer than we thought, but we're all glad we stuck with it. These arm warmers are a favorite of the pros because they are incredibly lightweight while being extremely warm for their weight. But even in milder conditions, you won't overheat. They are so elastic that you can barely feel them. But when you take them off, they take up a fraction of the space that normal arm warmers would take up in your pocket.

5. Castelli Pro Seamless Knee Warmer
The Pro Seamless Knee Warmer from Castelli is an innovative solution for those who want to stay active in changing temperatures. These knee warmers combine seamless comfort with a thoughtful design that offers both functionality and versatility. They are ideal for use in various weather conditions, providing pleasant warmth without overheating. The unique blend of polyester, nylon, and Lycra ensures an optimal fit and breathability, while the compact design allows for easy transport. These knee warmers are particularly popular among professionals and are perfect for cyclists who value performance and comfort.
- Seamless construction for maximum comfort
- Breathable material for optimal temperature regulation
- Compact design for easy portability
- Excellent fit thanks to elastic material composition.

6. Castelli Nano Flex 3G Kneewarmer
Nano Flex for Every Occasion
Nano Flex Warmers are characterized by their extremely versatile range of applications. They provide warmth like classic warmers but primarily offer decent moisture protection in the rain. We were the first manufacturer to use water-repellent thermal materials for cycling clothing. Many have attempted to imitate Castelli's Nano Flex - always without success. Uncompromising in all conditions.
Water-repellent, warming, and breathable Nano Flex material
A flat seam
Silicone grippers inside and out for a secure fit.

7. Castelli Espresso arm warmer
The Espresso Arm Warmer from Castelli is a functional piece of clothing specifically designed for use in cooler conditions. Made from a high-quality blend of polyamide, elastane, and polyester, this arm warmer provides pleasant thermal insulation and a comfortable fit. The slim fit design ensures that the arm warmer hugs the body closely without restricting movement. With an elegant design in a subtle Light Black, this arm warmer is suitable for both athletic activities and everyday wear. It is aimed at adults and is ideal for men who value functionality and style. The textile composition ensures that the arm warmer not only keeps you warm but is also breathable, making it a practical choice for various weather conditions. The Espresso Arm Warmer is an essential accessory for anyone looking to stay active even in cooler temperatures.

8. Castelli Pro Seamless 2 Arm Warmer
A wide temperature range combined with seamless comfort makes these models our most versatile and popular warmers among professionals.
- Mid-weight, seamless arm warmer
- Surprisingly warm without causing overheating
- Unique polyester/nylon/lycra blend (78% / 15% / 7%)
- Completely seamless construction
- Extra small pack size
A better arm warmer
With INEOS Genadiers, we set out to develop a better seamless arm warmer. Others on the market are made with a nylon/lycra blend that tends to retain moisture. However, we realized that we could achieve better moisture management with a polyester yarn. Working with polyester, though, makes it more challenging to achieve the right elasticity, shape retention, and manufacturing consistency. It took a year longer than we expected, but we are all glad we persevered. These arm warmers are a favorite among professionals because they are incredibly lightweight while being extremely warm for their weight. Yet even in milder conditions, they do not overheat. They are so elastic that you hardly feel them. But when you take them off, they occupy a fraction of the space that regular arm warmers would take up in your bag.

9. Castelli Espresso Legwarmer
The Espresso Legwarmers from Castelli are specifically designed for cyclists and provide optimal thermal insulation during rides. These long leg warmers are made from a high-quality material blend consisting of 52% polyamide, 32% polyester, and 16% elastane. This composition ensures a comfortable slim fit that hugs the legs while allowing freedom of movement. The leg warmers are presented in an elegant Light Black, making them a versatile addition to any cycling wardrobe. They are designed for adults and offer both functionality and comfort, ensuring a pleasant riding experience even in cooler temperatures. The Espresso Legwarmers are an ideal choice for those who value quality and performance while pursuing their passion for cycling.

10. Castelli Fast Legs Sleeves
Wind tunnel-tested calf sleeves for a comprehensive aero setup in racing.
Technical specifications
- Optimized in the wind tunnel to minimize air resistance
- Tailored fit with light compression
- Thin silicone tape ensures a secure hold
- Also available in custom designs for teams through the Servizio Corse program.
