Castelli Chpt.III 1.81 Sleeveless Base Layer

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2 in stock, ready to dispatch.
UK, EU and Worldwide delivery available.

Reserve now, collect immediately from our Esher Collection Point

Reserve now, collect from our Hampton Wick Store from 4 pm today

As part of the first collection from David Millar's Chapter 3 range, the Castelli Chpt.III 1.81 Sleeveless Base Layer is designed to be a super-lightweight layer that wicks moisture away from the skin allowing it to evaporate. The ultra-stylish pattern on the base layer is inspired by the parametric patterns created by Millar's performance data from stage 17 of the 2014 Vuelta.

Castelli Chpt.III 1.81 Sleeveless Base Layer

Staying cool and comfortable on a ride is of the utmost importance and the Castelli Chpt.III 1.81 Sleeveless Base Layer's designer, David Millar certainly knows this. The microfibre construction of the base layer means it is as soft and light as it could possibly be.

The base layer's hydrophilic outer layer wicks moisture off the skin and out to the jersey without absorbing any moisture along the way. The base layer is perfect when combined with the Chpt.III 1.21 Jersey. Contrary to the subdued colours of the outer layer, the base layer is far more comfortable, in a similar way that gentlemen may choose a different inner lining to his suit to contrast with the outside. In tailoring, this is called a reveal; a flash of colour occasionally glimpsed that shows there is more than first meets the eye.

David Millar: "The coloured design is taken from parametric patterns created from the data (a combination of my heart rate, watts, speed, distance etc.) of one of my final races, stage 17 at the 2014 Vuelta a Espana. The neck is a little rounder than normal, more like a vest than a t-shirt, this compensates for the higher necks of the 1.21 and 1.61. I chose a sleeveless cut as this and the 1.21 Jersey are designed to be used together, sleeves on an undershirt can often be more uncomfortable with a short sleeve jersey.”

PLEASE NOTE: The Castelli Chpt.III 1.81 Sleeveless Base Layer follows the same inch sizes as you would see when purchasing a shirt as this helps to provide a more personalised fit.

  • Polyester microfibre with hydrophilic outer layer
  • Parametric data pattern
  • A light, soft and stylish base layer
  • Imagined by David Milllar, made by Castelli


Size Guide

UK Delivery Options

Free Delivery on all orders over £30

Estimated delivery within 4 working days (a delivery charge of £1.99 for orders under £30.00 will apply)

CollectPlus Delivery - £1.99

Have your order delivered to your local shop for just £1.99! For Highlands and Islands, please allow up to 5 working days. Orders can be shipped to UK CollectPlus locations specified on the website where they will be held awaiting collection for a period of 10 days.

Orders placed are normally dispatched within 2 working days.

Priority 1st Class Delivery - £2.99

Estimated delivery within 2 working days. For Highlands and Islands, please allow up to 5 working days.

Next Working Day Delivery* - £4.99

A guaranteed tracked courier delivery, place your order before 3pm, deliveries are made Monday to Friday.

Saturday pre 12 Delivery - £4.99

Saturday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Saturday pre 12pm by courier. Package must be signed for upon delivery.

Sunday pre 12 Delivery - £4.99

Sunday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Sunday pre 12pm by courier. Package must be signed for upon delivery.

Reserve and Collect** - FREE

Reserve & Collect is available on all items marked 'Collection'. It is a FREE delivery option that allows you to collect your order from either our Sigma Sport Store, Hampton Wick or our Reserve & Collect location in Esher. Just select the Reserve & Collect button in the basket.

* Next Working Day delivery is only available on items in stock in our warehouse and excludes pre- order items. Next Day refers to the next working day, Bank Holidays will add an extra working day to the estimated delivery lead times. UK next day excludes Saturday deliveries. This service is not available to some remote postcode areas. Please contact us for help.

** Reserve and Collect Collections - Clothing, parts and accessories: Next day. Orders placed on Friday, Saturday or Sunday will be available for collection after midday on the Monday (excluding Bank Holidays). Bikes: 4 days if in stock at the store, collect in up to 7 days (sometimes quicker) if in stock at warehouse.

London Same Day (Order Before 1pm)

We offer a Same Day delivery service into London. The cost is £25.00 under 2Kg and £35 over 2Kg. Place your order before 1pm, deliveries are made Monday to Friday. Please note this option excludes bicycles.

More information on our Same Day delivery options.

Bike Deliveries

All our bikes are fully checked and tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for despatch. All you have to do is add the pedals, rotate and tighten the handlebars. Typically we can deliver your bike in 4 - 5 working days.

Deliveries are made Monday to Friday on a pre-12pm delivery. One of our customer service team will be in contact to arrange a convenient day for delivery.

More information on all our UK delivery options.

International Delivery and Returns

We ship to over 100 countries using DHL for a fast and reliable delivery. To see the delivery cost, please add your items to the basket and proceed to the checkout.

International customers have 30 days from their order date to return the order. Goods must be returned in new condition with all original packaging intact and tags attached.

For full details, see this link.

Free UK Returns

We offer a free returns service for our UK customers. Sigma Sport will happily refund or exchange any item purchased at Sigma Sport, excluding Sigma Sport gift vouchers and personalised products except when faulty.

More information on the Sigma Sport returns procedure.

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