Castelli Estremo Thermal underhelmet - Black
Castelli Estremo Thermal underhelmet - Black - One size / Black is backordered and will ship as soon as it is back in stock.
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Installment Payments
PayPal
The PayPal service allows you to pay for online purchases with just a few clicks, in a completely free and secure way. After selecting this payment method, you will be redirected to the dedicated page where you can enter your PayPal account details (if you do not have an account, you can sign up for free or proceed directly with the payment). Once the process is complete, you will receive an email confirmation of the successful payment and order receipt.
- Transaction fee: free
- Settlement time: instant
With PayPal, you can also pay in 3 convenient interest-free installments.
PLEASE NOTE: the maximum amount eligible for installments per single order is €2,000
Klarna
- Pay in 3 interest-free installments.
- Pay with Visa, Mastercard, Amex, Postepay and major Italian prepaid cards.
- Klarna is available in: Austria, Belgium, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Portugal, Spain.
PLEASE NOTE: the maximum amount eligible for installments per single order is €3,000
For more information about Klarna: https://www.klarna.com/international/
Scalapay
- Pay in 3 interest-free installments.
- Pay with Visa, Mastercard, Amex, Postepay and major Italian prepaid cards.
- Create a Scalapay account in just 2 minutes – registration is free and approval is immediate.
- Receive your order immediately and split the total into 3 convenient monthly installments, interest-free.
- Scalapay is available in: Italy, Belgium, Germany, Spain, France, Netherlands, Austria, Portugal, Finland.
PLEASE NOTE: the maximum amount eligible for installments per single order is €1,000
- If you purchase with Scalapay, you will receive your order immediately and pay in 3 installments. Please note that the installments will be assigned to Incremento SPV S.r.l., related parties and their assignees, and that you authorize such assignment.
Support
In case of issues with the financing method, overdue installments, errors during account creation or payment method changes, please contact SCALAPAY support.
Heylight
- Pay in 3, 4 or 5 interest-free instalments for purchases up to €3,000
- Interest-bearing financing in up to 36 instalments for purchases up to €10,000
- Once you select Heylight as your payment method, you will be redirected to the financial provider’s page where you will be asked to enter your personal details and upload certain documents to verify your creditworthiness.
- The order will be considered confirmed only after Heylight approves the financing request.
- Heylight is available in Italy only.
PLEASE NOTE: the maximum amount eligible for installments per single order is €5,000
For more information about Heylight: https://heylight.com/en
Product details
Product details
Castelli Estremo Thermal underhelmet: Protection and Warmth for Winter Cycling
The Castelli Estremo Thermal underhelmet is the ideal solution for those who practice winter cycling and seek uncompromising protection. Made with Polartec® AirCore™ on the front panels, it provides an effective barrier against the wind while maintaining a compact profile under the helmet. The Warmer fabric placed on the back promotes breathability and moisture evacuation, preventing the buildup of humidity. This balance between thermal insulation and moisture management makes it particularly suitable for extended training sessions in cold conditions, where body temperature regulation is essential for comfort and performance.
Thermal Technology and Optimized Ventilation
The Polartec® AirCore™ technology ensures wind protection without adding significant bulk, an essential feature for those wearing the underhelmet beneath a helmet shell. The thickness has been calibrated to provide maximum warmth while maintaining compatibility with any road or mountain bike helmet model. The double-layer structure, with Warmer on the back, creates a thermal management system that allows sweat to evaporate quickly, reducing the risk of sudden cooling during descents or breaks. This configuration is particularly advantageous for those who alternate moments of high effort with phases of active recovery.
Full Coverage and Lasting Comfort
The underhelmet fully covers the ears, protecting the areas most sensitive to cold during winter rides. The full ear coverage significantly reduces body heat loss, a critical element in road cycling where high speeds amplify the wind chill effect. The ergonomic design ensures a close fit without creating pressure points, delivering comfort even during long training sessions. Universal compatibility with standard helmets makes it a versatile choice for any cyclist looking to face the cold season with reliable protection.
Technical Features
- Front material: Polartec® AirCore™.
- Rear material: Warmer fabric for breathability.
- Coverage: Full ear coverage.
- Thickness: Optimized for helmet compatibility.
- Protection: Effective wind barrier.
- Moisture management: Rapid vapor evacuation.
- Compatibility: Universal with road and MTB helmets.
- Thermal insulation: Maximum warmth in winter conditions.
- Weight: Minimal bulk under the helmet.
- Color: Black.
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Reviews & Questions (0)
Shipping and delivery times
Shipping and delivery times
Orders are usually shipped within 24-72 hours (1-3 days) from payment receipt. Some items may have longer shipping times (5-7 days). The specific shipping times are indicated on each product page.
FREE SHIPPING (bikes excluded) from
| € 79.00 | Italy |
| € 129.00 | Europe, Principality of Monaco, and San Marino |
| € 249.00 | Australia, Canada, Japan, Switzerland, Norway |
Shipping costs start from
| € 6.50 | STANDARD SHIPPING in Italy with express courier |
Shipping times and costs may vary depending on the delivery country, chosen service, and weight.
Shipping with InPost service
| € 5.00 | Italy |
| € 12.00 | France, Benelux, Spain, Portugal, Poland |
Bicycle shipping
Shipping costs for all bicycles are fixed as follows.
| € 39.00 | Italy |
| € 49.00 | Europe |
| € 69.00 | Rest of the world |
Non-EU shipping
Local VAT and any customs duties for shipments of goods to customers outside the European Union (non-EU) will be charged to the recipient and requested by the courier at the time of delivery. If the delivery is not made due to refusal to pay the customs duties (local VAT and any applicable tariffs) requested by the importing country, all costs incurred by us for the return of the goods will be deducted from the refund.
In-store pickup
All online-ordered items can be picked up at the All4cycling store in the province of Varese, Via Gianfranco Miglio 2, 21045 Gazzada Schianno (VA).
For further details, we invite you to review the terms and conditions and the privacy policy.
Returns and refunds
Returns and refunds
- You can return your unused items within 60 days of delivery.
- All4cycling will check the condition of the returned product before issuing the refund.
- If the product, packaging or labels are missing, damaged or used, or if the returned product is different from the one purchased, All4cycling may reduce or refuse the refund.
- The refund will be issued within the time limits established by applicable law. Actual processing times may vary depending on receipt and inspection of the returned product and the payment method used.
- The refund will be issued using the same payment method used for the order. If you would prefer a different method, please specify this in the notes when submitting your return request.
- If you paid by cash on delivery, enter your IBAN in the return notes to receive the refund.
- Returns are eligible for a refund only: size exchanges are not available.
- Returns without an order reference will not be accepted.
- Returns are FREE in Italy. For all other countries, return shipping is at the customer’s expense.
- For returns from Germany and Austria, €6.90 will be deducted from the refund.
- For returns from Spain and France, €9.90 will be deducted from the refund.
- For all other countries, the cost varies depending on the courier selected. Shipping costs are entirely the customer’s responsibility.
FOR A SAFE RETURN
- Use suitable packaging, such as a box or mailing bag, to protect the product.
- Keep the original packaging and place it inside an outer shipping package.
- Do not remove any tags or labels and keep the original packaging.
- Avoid wearing perfume or deodorant when trying on garments that you may wish to return.
- Use a trackable shipping service.
SHIPPING COSTS
| Italy | FREE return at post offices and Poste Italiane collection points |
| Germany & Austria | Fixed cost of €6.90 with DHL |
| Spain & France | Fixed cost of €9.90 with DHL |
| Other countries | Variable cost depending on the courier selected by the customer |