Signature Deep Winter Long Sleeve Jersey Sea Moss

5 / 5

12 reviews

Signature Deep Winter Long Sleeve Jersey

Our warmest jersey is lightweight and at the same time pleasantly warm even in freezing weather.

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High quality brushed fiber of Polartec® Power Stretch® Pro™ material wicks away moisture quickly. High thermal insulation stretch material has improved elasticity in four directions and the polyamide fibers on the face side bring increased durability compared to polyester. Complete with flat seams for increased comfort and silicone tape around the entire bottom hem to hold the jersey in place. The ideal alternative for dry winters without rain.

235,00 USD

Sea Moss

XXL

XXXL

Size Guide

Free standard EU shipping on any order over 150 EUR
Express EU delivery 1-2 business days

4 way stretch

Moisture wicking

Breathable

Thermal regulation

Quick drying

3 large pockets

Flat seams

Silicone at the bottom

Reflective graphics

High level of compression

Temperature 0°C to 12°C

-8°C 0°C 8°C 16°C 24°C 32°C

Weight 6/6

Insulation 6/6

Breathability 6/6

Wind protection 1/6

Abrasion resistance 3/6

Compression 3/6

Specification

Polartec® Power Stretch® Pro™
Silicone tape around the entire bottom hem
3 back pockets +1 zipped
Made in the EU

Features

Increased elasticity in four directions
Superior abrasion resistance
High breathability
Quick Drying
Effectively wicks away moisture

Materials

53% Polyester
38% Polyamide
9% Elastane

Polartec® Power Stretch® Pro™

MEASUREMENT	XXS	XS	S	M	L	XL	XXL	3XL
A – Chest	< 85	85-91	91-97	97-103	103-109	109-115	115-121	121-127
B – Waist	< 73	73-79	79-85	85-91	91-97	97-103	103-109	109-115
C – Hip	< 88	88-94	94-100	100-106	106-112	112-118	118-124	124-130
D – Arm length	< 72	72-74	74-76	76-78	78-80	80-82	82-84	82-84
E – Inseam length	< 76	76-78	78-80	80-82	82-84	84-86	86-88	86-88

Weight / Height	159-164 cm	165-170 cm	171-176 cm	177-182 cm	183-188 cm	189-194 cm	195+ cm
W 60-66 kg	XS	XS	XS	XS	XS	–	–
W 67-72 kg	XS	XS	S	S	XS	–	–
W 73-79 kg	–	–	M	M	S	M	–
W 80-88 kg	–	–	XL	L	M	M	L
W 89-98 kg	–	–	XL	XL	L	L	XL
W 99+ kg	–	–	–	3XL	XXL	XXL	3XL

Product Reviews

5 / 5

12 reviews

Submitted 7.12.2025

By Jirka

Essential for winter rides

I really like it. It does its job perfectly as written in description. The fit is rather tight I had to reorder XL for me (190cm, 84kg).
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Submitted 20.2.2025

By Nicolas Siron

From Belgium

Perfect Protection for Cold Winter Rides

I’m very impressed with this jersey. It is perfect for cold and dry winter days, providing excellent insulation while still allowing breathability. The fabric feels soft and comfortable. During a long ride at 5°C, combined with a merino baselayer, I stayed warm without overheating. The fit is spot on. I am 188cm and 79kg and a size Large is snug without being too tight. Overall, this jersey is an excellent choice for winter cycling. It offers outstanding protection from the cold while maintaining comfort and ventilation. Perfect for anyone who wants to keep training seriously throughout the winter months!
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Submitted 3.10.2024

By Gabor

Essential winter gear

This jersey keeps its promises, covering dry and windless weather from late fall to early spring combined with baselayers as the temperatures fall. Worn with a Merino Deep Winter Baselayer it keeps you warm even at -4C. Pleasant feeling fabric, good fit, nice color, I can only recommend it.
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Submitted 12.2.2024

By Des O'Donnell

Very Impressed

The green version has fast become my favourite winter jersey. I usually run cold in winter and this is surprising warm paired with a short sleeve base layer. I'm 175cm/70kg and a Small is a snugger fit than the regular Isadore jerseys, but I think that's part of the design to keep the warmth in. Also means no bulk, so easy to add a fitted outer layer/rain jacket if the conditions change. Love the colour, but guess that's a personal thing. Many kms of use and highly recommended.
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Submitted 6.10.2025

By Daniel

Nice

Awesome color, super comfy, holds warm well and still wicks moisture efectively. Fit is perfect for me: M for 183cm, 63kg, so rather thin. A tad bit on the shorter side for me, but still feelds good. The zipper is nice, too.
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Submitted 31.10.2024

By Jakub

Perfect

Perfect product for colder weather. Polartec warms well and wicks away moisture.
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Submitted 3.10.2024

By Gabor

Essential winter gear

The jersey perfectly matches the promise contained in its description. It covers windless and dry weather from late autumn to early spring, combined optionally with a baselayer as the temperatures fall. Complemented by the Merino Deep Winter Baselayer, it keeps you warm even at -4C degrees. Nice and comfortable material, good fit, great color (Olive ecru) and breathability, I can only recommend.
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Submitted 10.7.2024

By Menno

Must have!

Size M. 1.89 cm 79kg. 57 years. Size Guide is good reflection of the size of the jersey. My upperbody is not what it used to be. So I have to loose some weight around the waist to make it a perfect size for me. If I don't its to tight for me. I have not tried the jersey on the bike yet. But I expect that I will only use it with a baselayer as there is not much room for more in my case. Beautiful colour. Very nice fabric. Feels warm and comfortable. Especially with the summer discount I got it's a must have. Looking forward to the winter.
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Submitted 11.11.2023

By Tom W.

Herr

Grösse S für mich mit meinen 179 cm und 74 KG passend und bei 4 Grad mit kurzem Baselayer optimale klimatische Verhältnisse. Das Jersey ist super zu tragen, sehr angenehm, bin sehr begeistert!
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Submitted 25.11.2025

By Pavel

Skvělý teplý dres

Extra příjemný materiál na těle, příjemně hřeje u krku, perfektně sedí. 182 cm, 72 kg, vel. L. Teplota kolem 0, termoprádlo, tento dres a zimní bunda Isadore, nic víc nepotřebujete.
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Submitted 21.10.2025

By Ferdinand Marton

From Austria

Feo

Warm, bequem und super angenehm. Kann ich nur empfehlen.
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Submitted 9.12.2024

By Lukas

Awesome winter jersey

Tested in 3 degrees average on a 3 hour ride with a merino LS base underneath. I felt warm and cozy the entire time, but never too warm and sweaty, so top marks for insulation and breathability from me. Build quality also feels top notch, the fabric is very stretchy. The only disadvantage are the comparatively smaller pockets compared to the merino LS jersey.
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