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TherMerino Jersey Castle Grey 1.0

Soft and luxurious fleece on the inside of the jersey will keep you warm and cozy on cold rides. Its blend of tech materials and Merino will be your key to feeling completely weather ready.

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Luxuriously soft and warm, with material that is a touch more concentrated than the Long Sleeve Jersey, our TherMerino Long Sleeve Jersey offers comfort, insulation and a fitted, non-flappy cut for cold days in the saddle.

97,50 USD
205,00 USD
The lowest price in the period of 30 days before the provision of the discount or the lowest price from the moment of the start of the sale until the provision of the discount, if the product has been on sale for less than 30 days.
Size Guide
  • Free standard EU shipping on any order over 150 EUR
  • Express EU delivery 1-2 business days
Snowflakes

Features

  • Additional zipped pocket to keep contents dry and secure
  • Isadore reflective logo on the back pocket
  • Luxurious fleece on the inside
  • Additional eyelets inside the jersey to lead headphone cables comfortably

Materials

  • 53 % Polyester
  • 43 % Merino wool
  • 4 % Lycra

Complete the look

TherMerino Jersey Hot Chocolate 1.0
TherMerino Jersey Hot Chocolate 1.0
-50%
TherMerino Jersey Hot Chocolate 1.0
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97,50 USD 205,00 USD
TherMerino Jersey Castle Grey 1.0
TherMerino Jersey Castle Grey 1.0 97,50 USD 205,00 USD

Size Guide Fit Guide

Dimension table (cm)

SIZE XXS XS S M L XL XXL XXXL
A - BACK LENGTH < 64 64 – 67 67 – 70 69 – 72 71 – 74 73 – 76 76 – 79 79+
B - CHEST < 82 82 – 84 84 – 88 88 – 94 94 – 100 100 – 106 106 – 114 114+
C - COLLAR < 33 33 – 35 35 – 37 37 – 39 39 – 41 41 – 43 43 – 46 46+

Dimension table (inch)

SIZE XXS XS S M L XL XXL XXXL
A - BACK LENGTH < 25 25 – 26,5 26,5 – 28 27 – 28 28 – 30 29 – 30 30 – 31 31+
B - CHEST < 31,25 31,25 – 33 33 – 34,75 34,75 – 37 37 – 39,5 39,5 – 41,75 41,75 – 45 45+
C - COLLAR < 13 13 – 13,75 13,75 – 14,5 14,5 – 15,5 15,5 – 16,25 16,25 – 17 17 – 18 18+

The cut is slim fit, made out of stretchy materials. The sizes and cuts of our products, however, are designed to fit standard dress size parameters you would usually wear.

Sizing guide

Not sure if you've chosen the right size?
Use our Size Calculator feature.

Product Reviews

5 / 5
74 reviews
  • Submitted 27.10.2025

    By Marco

    Great Quality

    Great Materials and finish. It will add more motivation for colder run. Fitting as expected, I thought XS could be small but is just perfect, I´m 1.74, 69kg.
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  • Submitted 28.10.2025

    By Tomo

    Size

    Best size for 173cm 60kg
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  • Submitted 21.10.2024

    By Richie

    Great but a bit tight (esp. the collar)

    Great product! Very warm and soft, the build quality looked great. I am 1m71, 62kg and ordered an XS according to the size chart and recommendation. However, I found the jersey to be a bit too tight, especially if I wore a base layer. The biggest problem was that I could not close the collar all the way up because it would strangle me at the neck. So I returned it and would order S instead.
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  • Submitted 11.1.2024

    By Robert Scanlon

    Awesome winter jersey

    I don't normally get gushy about cycling gear but I absolutely love this jersey. It is incredibly warm and soft, the quality is outstanding and it looks good too. Kudos to Isadore. I have 5 different jerseys from them and they are all superb.
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  • Submitted 21.12.2023

    By Chris

    Warmest softshell jersey

    Warmest softshell Jersey ever. With a short sleeve below good for below freezing. Super comfortable. Would like to see a casual sweater with this material.
    Show full review

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