Short Sleeve

Castelli Pro Issue Short Sleeve Base Layer - White


Why to buy: A base that provides extra comfort to your ride, so your jersey can get on with what it does best - perform. A lightweight design with a fully breathable 3D mesh and reduced seaming at the shoulders.

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Available Delivery Options XSSMLXL
UK Next Day



Wearing a base layer under a cycling jersey can really improve your comfort and performance on the bike. Sometimes, your jersey needs a little helping hand to ensure your ride is the best it can be, so you feel dry for longer.

Made from a 3D mesh fabric, the Castelli Pro Issue Base Layer provides just the right amount of ventilation for when conditions sit between hot and cold. It's not boiling lobster out there and it's not freezing either - like those days you feel silly because it looks nice enough for shorts, but actually reads 10°C with wind. It's nice and light under a jersey, so won't feel bulky and reduced shoulder seaming offers extra comfort.

The Castelli Pro Issue Base has one main focus - to draw sweat away from your skin, so you stay dry and your jersey performs to the max.

Size Guide

  A Chest B Waist C Hips D Inseam
X-Small 31" / 79cm 25" / 63cm 34" / 87cm 29" / 75cm
Small 33" / 84cm 27" / 68cm 36" / 92cm 30" / 76cm
Medium 35" / 89cm 29" / 73cm 38" / 97cm 30" / 77cm
Large 37" / 94cm 31" / 78cm 40" / 102cm 31" / 78cm
X-Large 39" / 99cm 33" / 83cm 42" / 107cm 31" / 79cm


Not sure where to measure? Search through the images above until you find the measurement guide.

Tech Spec

  • 100% Polyester 3D mesh fabric
  • Breathable
  • Lightweight
  • Reduced seaming at shoulders ~ extra comfort, zero irritation
  • Double layer construction at neck
  • Women's specific cycle cut
  • Weight: 38g (Small) 
  • 15 - 25 degrees 

Ideal for cool conditions, not hot or cold but somewhere in the middle.

Who's Behind It?

Q. What do a 19th century Italian tailor, a designer for the Milan Ballet and the first ever lycra cycling shorts have in common?

A. They are all part of a rich 140 year history that's led to today's most recognised brand in cycling: Castelli.

Throw in a heart attack on a famous Italian climb, family feuds, Olympic gold medals and controversy in the pro peloton and it begins to sound more like a Sicilian soap opera than the backdrop to a cycling brand. But then again Castelli is no ordinary brand.

Today, Castelli's scorpion emblem is arguably the single most recognised in cycling. Iconic is an overused word these days, but the Castelli brand surely qualifies.

We first discovered Castelli on our year long ride through the Americas in 2010, when our founder Liz (pictured) wore Castelli shorts and loved them, so stocking them seemed an obvious choice. But we're almost as captivated by the story behind the name as the kit itself! For the full Castelli story (it's quite a story!), click here.

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