The Giro Merino Wool under helmet is lightweight, comfortable and stylish on and off the bike. This cycling cap is thin enough to fit under your helmet and is built with sophisticated panelling to prevent any bunching of fabric.
Compared to many cycling caps the Giro Merino Wool under helmet has a shortened brim giving you better upper peripheral vision without compromising on its ability to block the sun and rain.
- Winter weight Australian merino wool blend
- X-Static liner
- Reinforced brim
- Ear flaps fold up or down
- Size: S-M 51-57cm, L-XL 57-63cm
- Colour: Black
Occasionally, without notice, manufacturers change product design and/or specifications.
Use the Giro size chart to find the best fit for you.
Giro Men's Tops Size Chart
|S (35)||33 - 35" / 83.8 - 88.9cm||34" / 86.4cm|
|M (38)||36 - 38" / 91.4 - 96.5cm||35" / 88.9cm|
|L (41)||39 - 41" / 99.1 - 104.1cm||36" / 91.4cm|
|XL (44)||42 - 44" / 106.7 - 111.8cm||36.5" / 92.7cm|
|XXL (47)||45 - 47" / 114.3 - 119.38cm||37" / 94cm|
Giro Men's Bottoms Size Chart
|Size||Waist||Inseam - Pant Only|
|28 (XS)||27.5 - 28.5" / 69.85 - 72.39cm||31.5" / 80.01cm|
|30 (S)||29.5 - 30.5" / 74.93 - 77.47cm||31.5" / 80.01cm|
|32 (M)||31.5 - 32.5" / 80.01 - 82.55cm||32.5" / 82.55cm|
|34 (L)||33.5 - 34.5" / 85.09 - 87.63cm||33.5" / 85.09cm|
|36 (XL)||35.5 - 36.5" / 90.17 - 92.71cm||34.5" / 87.63cm|
|38 (XXL)||37.5 - 38.5" / 95.25 - 97.79cm||34.5" / 87.63cm|
Giro Women's Tops Size Chart
|XXS (2)||30 - 31" / 76.2 - 78.7cm||30.5" / 77.4cm|
|XS (4)||32 - 33" / 81.3 - 83.8cm||31" / 78.7cm|
|S (6)||34 - 35" / 86.4 - 88.9cm||31.5" / 80cm|
|M (8)||36 - 37" / 91.4 - 94cm||32" / 81.3cm|
|L (10)||38 - 39" / 96.5 - 99.1cm||32.5" / 82.6cm|
|XL (12)||40" / 101.6cm||33" / 83.8cm|
Giro Women's Bottoms Size Chart
|Size||Waist||Hip||Inseam - Pant Only|
|2 (XXS)||23 - 24" / 58.4 - 60.9cm||33 - 34" / 88.8 - 86.3cm||30.5" / 77.47cm|
|4 (XS)||25 - 26" / 63.4 - 66cm||35 - 36" / 88.9 - 91.4cm||30.5" / 77.47cm|
|6 (S)||27 - 28" / 68.6 - 71.1cm||37 - 38" / 94 - 96.5cm||31" / 78.74cm|
|8 (M)||29 - 30" / 73.7 - 76.2cm||39 - 40" / 99.1 - 101.6cm||31" / 78.74cm|
|10 (L)||31 - 32" / 78.7 - 81.3cm||41 - 42" / 104.1 - 106.7cm||31.5" / 80.01cm|
|12 (XL)||33" / 83.8cm||43" / 109.2cm||31.5" / 80.01cm|
Giro Men's Gloves Size Chart
|Men||Palm Width||Finger Length|
|XS||7" or less/ 178mm||6.8" or less/ 174mm or less|
|S||7-6"/ 178-203mm||6.8-7"/ 175-180mm|
|M||8-9"/ 203-229mm||7-7.4"/ 181-188mm|
|L||9-9.75"/ 229-248mm||7.4-7.8"/ 189-199mm|
|XL||9.75-10.5"/ 248-267mm||7.8-8.3"/ 200-210mm|
|XXL||10.5" or more/ 267mm or more||8.3" or more/ 211mm or more|
Giro Women's Gloves Size Chart
|Women||Palm Width||Finger Length|
|S||6 - 6.7" / 153 - 169mm||6 - 6.3" / 153 - 160mm|
|M||6.7 - 7.4" / 170 - 189mm||6.3 - 6.7" / 161 - 169mm|
|L||7.4 - 8.3" / 190 - 210mm||6.7 - 7" / 170 - 177mm|
Read our clothing size guide for more information on sizing.
Customer reviews and Q&A's are disabled because you declined functional cookies.
To enable reviews and Q&A's click the 'Cookie Settings' button below and enable functional cookies.
Giro Merino Wool Under Helmet Cycling Cap
Christmas Delivery- this product is available for Christmas Delivery
Cycle to Work is a salary sacrifice scheme, where you can save up to 42% off a new Bike and Safety equipment. This means the cost is deducted from your salary as a non-cash benefit, so you save on tax and national insurance.
Here at Tredz, we accept Cycle to Work vouchers from all national schemes. For more information click here.
At Tredz, we’re committed to bringing you the best products at the best prices. If you find a product cheaper elsewhere, simply contact us for an immediate response using our live chat service. Click here to discuss your price match with an agent now for help.
At Tredz, we offer a fast high quality service, with a range of options from free delivery on orders over £20, next day and convenient click & collect from one of our stores. Simply select within the checkout.
At Tredz, if you are not 100% happy with your order, then you can use our simple hassle free returns service. Simply return the item new and unused in the manufacturers original packaging within 365 days of purchase. Bikes and larger items are collected by courier.
Well designed and well made, this Giro cap is very good. It isn't bulky so easily fits under a helmet, and I find that the peak combined with my Oakleys keeps cold headwind off my forehead, adding to the feeling of warmth compared to what I get if just wearing a peak-less skullcap. Plus the pull down flap at teh back covers the ears and back of the neck very well, keeping cold draughts out when worn with a buff. Merino stays warm even when it gets wet, and after a mid-ride cafe stop it doesn't stay cold for very long as a cotton cap would do. Mine is completely black with a small red Giro logo stitched onto the peak. Good price, well worth it. Now my favourite off-season hat.
£5 off voucher
Sign up to our newsletter
Get all the deals and special offers first
© Performance Cycling Limited 2023. Tredz is a trading name of Performance Cycling Limited. All Rights Reserved Company No. 03398601 | VAT No: 797 0776 69
† IMPORTANT INFORMATION: Performance Cycling Limited FRN: 720557 trading as Tredz & Tredz Bikes are Authorised and Regulated by the Financial Conduct Authority. We are a credit broker, not a lender – credit is subject to status and affordability, and is provided by a panel of lenders of whom we have a commercial relationship. Terms & Conditions Apply. Performance Cycling Limited trading as Tredz is registered in England and Wales 03398601. Registered office: Icknield Street Drive, Washford West, Redditch, Worcestershire, England, B98 0DE. Performance Cycling Limited trading as Tredz is authorised and regulated by the Financial Conduct Authority. Our registration number is 720557. Credit provided subject to age and status.
† Novuna Representative Example: If total purchase price is £4,255.52 and your selected term is 36 months 14.9% APR Representative, Annual Interest Rate 14.9% p.a. Fixed with £0 deposit you would pay £145.38 per month. Total amount payable will be £5.233.68 with a cost of credit of £978.16.
† Novuna Buy Now Pay Later Example: If total purchase price is £4,255.52, payment holiday of 12 months and 24 monthly payments at 9.9% APR Representative, Annual Interest Rate 9.9% p.a. Fixed with £0 deposit you would pay £213.02 per month. Amount of Credit £4255.52, Total amount payable will be £5,112.48 with a cost of credit of £856.96. If the loan amount is voluntarily paid in full before the deferral period ends, interest will be waived but an early settlement fee up to £29 will apply.
Finance is subject to application, financial circumstances and borrowing history. Performance Cycling Limited FRN: 720557 trading as Tredz are authorised and regulated by the Financial Conduct Authority. We are a credit broker not a lender – credit is subject to status and affordability and is provided by Mitsubishi HC Capital UK PLC. Terms & Conditions Apply.
PayPal Credit is subject to status. Terms and Conditions apply. Performance Cycling Limited acts as a broker and offers credit from PayPal Credit. PayPal Credit is a trading name of PayPal UK Ltd Registered Office: Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH. † Full Representative Example: Representative 23.9% APR (variable), Purchase interest rate 23.9% p.a. (variable), Assumed credit limit £1,200.00.
PayPal Credit and PayPal Pay in 3 are trading names of PayPal UK Ltd Registered Office: Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH. PayPal Credit: Terms and conditions apply. Credit subject to status, UK residents only, Performance Cycling Limited acts as a broker and offers finance from a restricted range of finance providers. PayPal Pay in 3: PayPal Pay in 3 is not regulated by the Financial Conduct Authority. Pay in 3 eligibility is subject to status and approval. 18+. UK residents only. Pay in 3 is a form of credit, may not be suitable for everyone. Use may affect your credit score or make credit less accessible or more expensive for you. Consider if affordable for you. See product terms for more details.
Learn more about Pay in 3