Castelli Core Seamless Sleeveless Base Layer
Note: Castelli size their clothing small. For the best fit, go up one size
- ShowProduct Information Miracle Layer We've never been happy with the traditional nylon/Lycra® construction of most seamless... read more
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We've never been happy with the traditional nylon/Lycra® construction of most seamless base layers, which tend to hold a lot of moisture. We engineered this Core Seamless with a mixture of polyester and polypropylene that moves the moisture away from your body with absolutely minimal moisture uptake.
The fabric is soft next to your skin and provides great temperature regulation in mild conditions. It's not for hot temperatures but it does work as a first layer even into cooler temperatures, while the seamless construction keeps it extremely comfortable next to your skin.
- Seamless lightweight drying layer
- Ideal for cool to mild conditions when keeping yourself dry is the priority
- Unique mix of polyester and polypropylene provides maximum moisture management with significantly lighter weight
- Seamless construction gives exceptionally stretchy fit
- 15°-25°C / 59°-77°F
- Weight:45 g
Occasionally, without notice, manufacturers change product design and/or specifications.
Castelli Size Chart
Castelli Clothing Sizing Guide
Use the Castelli size chart to find the best fit for you.
Note: Castelli size their clothing small. To ensure an optimal fit it is recommended you go up one size, compared to your normal cycle clothing size.
Castelli Men's Sizing
Castelli Women's Sizing
Read our clothing size guide for more information on sizing.
Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!
Base Layer Guide
Delivery & Guarantee
UK Delivery Information
International Deliveries – Temporarily Suspended 11/11/20
Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey.
Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.
Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.
Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.
Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.
Please note that Pre-Order dates can sometimes change due to updated stock information.
Click here for more UK and international delivery information.
Returns & Warranty
It's easy to return a product with our 365 day, hassle free returns.
We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.
For more information please visit our Returns & Warranty page.