Castelli Flanders 2 Long Sleeve Black Undershirt

Castelli Flanders 2 Long Sleeve Black Undershirt

Name: Castelli Flanders 2 Long Sleeve Black Undershirt
Brand: Castelli
SKU: 4525525010
Price: 55.63 USD
Availability: InStock

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CASTELLI · SIZE GUIDE

Measure with a tape and compare with the charts. For best results, measure over underwear. If you are between two sizes, choose the larger one.

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Men · Tops · Men · Bottoms · Men · Gloves · Men · Socks · Men · Shoecovers
Women · Tops · Women · Bra · Women · Bottoms · Women · Gloves · Women · Socks · Women · Shoecovers
Kids

How to measure (Castelli)

Chest: keep the tape horizontal under the arms, around the fullest part of the chest.
Waist: measure around the natural waist, not too tight (slightly loose).
Hips: measure around the fullest part of the hips with feet together.
Inseam: using pants that fit well, measure from the inseam seam down to the ankle bone.
Gloves: measure hand circumference.
Socks / Shoecovers: based on your shoe size.

MEN

Tops · Size chart (Men)

	Unit	XS	S	M	L	XL	2XL	3XL
1. Chest	cm	88	92	96	100	105	110	115
1. Chest	in	34.5	36	37.5	39	41	43	45
2. Waist	cm	76	80	84	88	93	98	103
2. Waist	in	30	31	33	34.5	36.5	38.5	40.5

Bottoms · Size chart (Men)

	Unit	XS	S	M	L	XL	2XL	3XL
1. Hips	cm	90	94	98	102	107	112	117
1. Hips	in	35.5	37	38.5	40	42	44	46
2. Inseam	cm	81	82	83	84	85	86	87
2. Inseam	in	31.8	32.2	32.8	33.2	33.5	33.8	34.2

Gloves · Size chart (Men)

	Unit	XS	S	M	L	XL	2XL
1. Hand circumference	cm	< 18.4	18.4 – 20.3	20.3 – 22.2	22.2 – 24.1	24.1 – 26	> 26
1. Hand circumference	in	< 7.2	7.2 – 8	8 – 8.7	8.7 – 9.5	9.5 – 10.2	> 10.2

Socks · Size chart (Men)

	S/M	L/XL	2XL
EU	35 – 39	40 – 43	44 – 47
US	4 – 7	8 – 10	11 – 14

Shoecovers · Size chart (Men)

	S	M	L	XL	2XL
EU	36 – 39	40 – 42	43 – 44	45 – 46	46 – 48
US	4 – 7	8 – 9	10 – 11	12 – 13	13 – 14

WOMEN

Tops · Size chart (Women)

	Unit	XS	S	M	L	XL
1. Chest	cm	79	84	89	94	99
1. Chest	in	31	33	35	37	39
2. Waist	cm	63	68	73	78	83
2. Waist	in	24.5	26.5	28.5	30.5	32.5

Bra · Size chart (Women)

	Unit	XS	S	M	L	XL
1. Chest	cm	81 – 85	86 – 90	91 – 95	96 – 100	101 – 105
1. Chest	in	32 – 33.5	34 – 35.5	36 – 37.5	38 – 39.5	40 – 41.5
2. Underbust	cm	65 – 69	70 – 74	75 – 79	80 – 84	85 – 89
2. Underbust	in	25.5 – 27	27.5 – 29	29.5 – 31	31.5 – 33	33.5 – 35

Bottoms · Size chart (Women)

	Unit	XS	S	M	L	XL
1. Hips	cm	87	92	97	102	107
1. Hips	in	34	36	38	40	42
2. Inseam	cm	75	76	77	78	79
2. Inseam	in	29.5	29.9	30.3	30.7	31.1

Gloves · Size chart (Women)

	Unit	XS	S	M	L	XL
1. Hand circumference	cm	< 16.6	16.6 – 18.4	18.4 – 20.2	20.2 – 22	> 22
1. Hand circumference	in	< 6.5	6.5 – 7.2	7.2 – 8	8 – 8.7	> 8.7

Socks · Size chart (Women)

	S/M	L/XL
EU	35 – 38	39 – 41
US	5 – 7	8 – 11

Shoecovers · Size chart (Women)

	S	M	L
EU	35 – 37	37 – 39	39 – 42
US	3 – 5	5 – 7	7 – 9

KIDS

Size chart (height + hand circumference).

	Unit	6Y	8Y	10Y	12Y	14Y
1. Height	cm	116	128	140	152	164
1. Height	ft	3.8	4.2	4.6	5	5.4
2. Hand circumference	cm	—	14.2 – 16	16 – 17.8	17.8 – 19.6	—
2. Hand circumference	in	—	5.6 – 6.3	6.3 – 7	7 – 7.7	—

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Flanders 2 M/L Undershirt – Total Thermal Insulation for Cold Conditions

The Castelli Flanders 2 long sleeve undershirt is the brand's warmest base layer. Its SottoZero Fleece 100% polyester fabric and medium neck ensure insulation and comfort on the coldest winter days.

Material: SottoZero Fleece 100% polyester fabric
Fabric Technology: Multi-density with thermal fleece lining
Breathability: High – mesh in the underarms for localized ventilation
Fit Details: Medium-height neck and flat Merrow seams
Specific Technology: SottoZero thermal lining, anatomical structure, strategic underarm mesh

Technical Features

The Castelli Flanders 2 long sleeve is the ultimate base layer for those who train or compete in cold conditions. Designed to offer maximum warmth with a structure aimed at efficiently wicking away sweat.

SottoZero Fabric: Extreme Warmth

Made with multi-density thermal 100% polyester fabric, the SottoZero Fleece base traps body heat and insulates against the external cold, without compromising lightness or comfort against the skin.

Ergonomic Design with Smart Ventilation

The medium-height neck provides additional protection on the harshest winter days. Mesh inserts in the underarms improve ventilation in key areas, preventing overheating during high-intensity outings.

Flat Merrow Seams for Total Comfort

The flat seams minimize chafing and improve fit under any outer garment. A functional, lightweight, and warm base layer, ideal for your coldest routes.

Sex: Men
Color: Black

Reference 4525525010-L

ean13 8056006484650

Product Availability

Most of our items are in stock and marked on the product page as "Available. Immediate shipping".

For items with size variations, this information will appear once the appropriate option is selected. If we do not have immediate stock, the estimated delivery time will be shown. We keep this information up to date and work hard to deliver your order as soon as possible. If the item is unavailable, you can subscribe to an alert to be notified once it’s back in stock.

Payment Methods

We accept card payments, PayPal, Klarna, Amazon Pay, among others. Once received and confirmed, we will process your order and begin preparation.

Shipping and Costs

We offer free shipping on most of our orders. For purchases over €100, shipping is free to countries such as Belgium, France, Germany, Luxembourg, the Netherlands, Portugal, and Spain. We do not ship to the Azores, Madeira, the Canary Islands, Reunion Island, or Guernsey..

Returns Policy

We want you to be completely satisfied with your purchase, so you have 30 days to return your order, as long as return conditions are met. You can find more information about exchanges and returns here. For hygiene and safety reasons, returns of unsealed and/or activated electronic products, food items, swimsuits, and wetsuits are not accepted. See details here.

Size Exchanges

For size-specific products, please refer to the size guide on the product page to choose the best fit. If you need a different size upon receipt of your order, you have up to 30 days to request a change. Follow the steps detailed here