This dual fabric base layer delivers on both the two key indicators, insulation and breathability, providing you with maximum performance in cooler conditions. Constructed from a merino rich micro-fibre blend and with flat locked seams to prevent chaffing, it is extremely soft against the skin and the ground-up female styling is cut to a race fit.

The structured fabric on the front panel captures air within the weave itself to improve thermal insulation while the cutting edge bio-ceramic technology means that heat absorbed by the yarn itself can be returned to the body to improve microcirculation. The fibre blend on the the back and arms is specifically designed to provide outstanding wicking and unrivalled moisture transfer.

Cosette is a highly versatile piece that can be worn under a jersey or jacket, on its own or as part of deep winter layering.

  • Technical Merino Rich Blend
  • Dual Fabric Construction
  • High Wicking and Fast Drying

"Incredibly comfortable and an essential piece of kit for winter mornings, 5/5" The Times


This garment has a race fit.

  Chest Waist Hips Arm
XS <76 <66 <92 <56
S 76-81 66-71 92-97 56-59
M 81-86 71-76 97-102 59-61
L 86-97 76-81 101-107 61-64
XL >97 >81 >107 >64
  Chest Waist Hips Arm
XS <32 <26 <36 <22
S 32-34 26-28 36-38 22-23
M 34-36 28-30 38-40 23-24
L 36-38 30-32 40-42 24-25
XL >38 >32 >42 >25

Size Conversion Chart

  Europe UK USA Japan
XS 36 8 4 9
S 38 10 6 11
M 40 12 8 13
L 42 14 10 15
XL 44 16 12 17


To keep all of your apparel looking its best, please follow the care instructions on the garment. As our products are made from the highest quality materials, special care will also guarantee a long life.

  • Machine Wash
  • Do Not Tumble Dry
  • Do Not Iron
  • Do Not Dry Clean
  • Do Not Bleach


  • 42% Merino | 23% Polyamide | 35% Polypropylene
  • Dual Fabric Construction
  • Flat Locked Seams
  • Moisture Management Properties
  • Race fit
  • Made in Europe


Merino has been proven to breath, wick moisture and regulate body temperature more effectively than synthetics. Unlike some other wool, high-grade merino also has a fine micron count which makes it super soft and comfortable against the skin.

We have carefully selected fabrics that combine the best of what both nature and science have to offer. Our merino jerseys offer the unparalleled comfort, fantastic thermoregulation and odour resistant properties of the natural wool enhanced with the additional strength, durability and rapid drying capability of proprietary synthetic fibres.

Works With