Winter Gruppetto Base Layer

Couleur: Dark Blue

A remarkable merino wool base layer to keep warm when it is cold and wick moisture efficiently.

Made with a great quality merino wool, made in Italy, the Gruppetto base layer transfers the moisture from the skin to regulate the body temperature. The fabric is naturally anti-bacterial and odour resistant, it will keep you warm and dry, whatever the weather and the intensity of the effort. It feels good inside the Gruppetto.

Experienced cyclists know it, the base layer is an essential part of the outfit. In summer and in winter, it is versatile enough to be worn when during the changing pace of your efforts or in variable weather conditions.

To design the Gruppetto base layer respecting Mercier quality standards, we have selected a material made of 75% remarkable merino wool, made in Italy. Indeed, this natural fibre offers the best thermal and moisture wicking properties. It efficiently wicks the moisture away from the skin to keep you dry and warm. In addition, merino wool is naturally anti-bacterial and odour resistant. The Gruppetto base layer is soft on the skin and is not itchy.

As a nod to the outfit worn by racing cyclists in the 1960s, a zip will allow you to open the base layer down a third of the chest for an adapted ventilation. The Mercier logo is embroidered on the chest and a crown placed on the sleeve testifies of Mercier’s will to offer products of an exceptional quality. Indeed, Gruppetto is handmade in Italy by a family business which possesses all the savoir-faire to work a material as noble as merino wool.

- Zip on the front which opens down to a third of the chest
- Embroidered logo on the torso and the sleeve
- Three-coloured label on the side
- Anti-bacterial and odour resistant merino wool
- Handmade in Italy 
- 75% Wool, 18% Polyamide, 7% Elastane

Care Instructions

- Wash at 30-40°C
- Use wool detergent
- Machine or hand wash
- Cold rinse well
- Do not tumble dry
- Normal spin
- Do not leave wet
- Low iron 120°C
- Wash dark colours separately

Jerseys & Bib shorts  | Arm Warmers  | Socks  | Overshoes 
Cap  | Mitts  | Winter Gloves 

How to measure accurately?

1. The chest

Hold a measuring tape horizontally and keep it straight whilst wrapping it once round the widest part of your chest.

2. The waist

Keep the measuring tape horizontal and wrap it around the smallest part of your waist.

3. Hips

Put your feet together and keep the measuring tape straight, wrap it around the widest part of your hips.

4. Arms

Straighten your arms and measure between the start of your arms and your wrist.

Size guide

Size guide

Size guide


Jerseys and Bibshorts

Our products are made to fit tightly and have been designed to suit training and racing conditions. If you are not sure about which size, or if, like us, you like to eat and drink well - then choose the larger size - it will be the right one.

Chest 86-90 91-95 95-100 101-105 106-110 111-115
Waist 72-76 77-81 82-86 87-91 92-96 97-101
Hips 85-89 90-94 95-99 100-104 105-109 110-114


Chest 34-35,5 36-37,5 37,5-39,5 40-41,5 42-43,5 44-45,5
Waist 28,5-30 30,5-32 32,5-34 34,5-36 36-38 38-40
Hips 33,5-35 35,5-37 37,5-39 39,5-41 41,5-43 43,5-45


Arm Warmers

Arm Length 49,5 51,5 53,5
Half upper arm width 12,5 13,5 14,5

Half bottom arm width

7 8 9

Arm length 19,5 20,3 21

Half upper arm width

4,9 5,3 5,7

Half bottom arm width

2,8 3,1 3,5



EU 35-38 39-42 43-46
UK 3-5,5 6,5-8 8,5-11
US (Man) 3,5-6 7-8,5 9-12
Japan (Man) 21,5-24 25-26,5 27,5-30


EU 39-40 41-42 43-44 45-46
UK 6,5-7 7,5-8 8,5-10 11-12
US (Man) 7-7,5 8-8,5 9-10,5 11,5-12,5
Japon (Man) 25-25,5 26-26,5 27,5-28,5 29,5-30,5



One Size fits all! 



To know your mitts size, you just need to know... your shoe size.

Mitts Size EU US (man) UK (man) JAPAN
7 37-38 6 4-5 23,5-24
7,5 39-40 6,5-7 5,5-6 24,5-25
8 40,5-41,5 7,5-8,5 6,5-7,5 25,5
8,5 42-43 9-10 8-9 26-27
9 43,5-44,5 10,5-11,5 9,5-10,5 27,5-28,5


Winter Gloves

Help with measuring

1. Knuckles
Measure around the widest part of your dominant hand, between thumb and index finger.

2. Hand length
Measure from fingertip to base of wrist.

Knuckles (cm) 18-19 19-20 20-21 21-22
Hand Length (cm) 17-18 18-19 19-20 20-21

Knuckles (in) 7.08-7.48 7.48-7.87 7.87-8.27 8.27-8.66
Hand Length (in) 6.69-7.08 7.08-7.48 7.48-7.87 7.87-8.27

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