Men's Singi Heavy Flannel Shirt

$130

Color: Dark Navy-Maroon

Size:

Size guide

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Top features

Heavy Organic Cotton Flannel

G-1000® Reinforcement

Roll-Up Sleeves

Description

A long-sleeved outdoors shirt with a button-down collar and a regular fit, cut from soft, heavy organic cotton flannel. G-1000 reinforcements on the inside of the collar, the sleeve cuffs and the pocket flaps take the wear where a flannel usually gives out first. Two chest pockets have pen holders, and the sleeves roll up and button in place when the day warms.

Perfect for

Everyday Wear

A flannel cut to be worn constantly.

Camp and Trail

Warm enough as a standalone autumn layer.

Mid Layer

Works under a shell on cold days.

Features

Heavy Organic Cotton Flannel. A dense, brushed flannel that holds warmth and softens with every wash.
G-1000® Reinforcement. Collar, cuffs and pocket flaps are backed with G-1000 where flannel wears out.
Roll-Up Sleeves. Sleeves roll and button in place when the day warms up.
Twin Chest Pockets. Both pockets carry pen holders under buttoned flaps.
Organic Cotton. Grown to organic standards, in Fjallraven's long-wear cut.

Size & Fit

Slim

Regular

Relaxed

Standard fit with room to move. True to size for most.

The Singi Heavy Flannel Shirt has a regular fit with room to wear a base layer underneath. Heavy flannel softens with washing rather than shrinking noticeably — take your usual size.

Open size guide

Materials

Body: 100% cotton (organic).
Reinforcement: G-1000® — 65% polyester (recycled), 35% cotton (organic).
Care: Wash at 40°C, normal process. Do not dry clean, bleach or tumble dry. Iron at 1 dot (max 110°C). Do not use fabric softener. Wash with similar colours.

About the brand

From the Arctic tundra to your everyday commute, Fjällräven designs gear that lasts. Rooted in Swedish simplicity and sustainability, their packs and apparel are made for life outdoors. At Mountain Sports, we love Fjällräven for its timeless style, thoughtful function, and enduring respect for nature.

Shop all Fjallraven

SKU F81373 · Style F81373

Size guide

Fjallraven Size Chart - Men's Apparel

Fjällräven Sizing Chart

Measurements are in inches, unless otherwise noted. Charts reflect body measurements, not garment dimensions. If your measurements fall between sizes, select the larger size for a looser fit or the smaller size for a closer fit.

Men's Jackets & Tops (International Sizes):

Size	XS	S	M	L	XL	XXL	XXXL
Chest	33.9	36.2	38.6	40.9	43.3	45.7	48
Waist	28.3	30.7	33.1	35.4	37.8	40.2	42.5
Seat	34.6	37	39.4	41.7	44.1	46.5	48.8
Arm Length	32.7	33.3	33.9	34.4	35	35.6	36.2

Men's Jackets & Tops - New Fit:

Size	XXS	XS	S	M	L	XL	XXL
Chest	32.7	35.0	37.4	39.8	42.1	44.9	48.4
Waist	27.6	29.9	32.2	34.6	37.8	40.9	44.5
Seat	32.3	34.6	37.0	39.4	41.7	44.5	47.2
Arm Length	32.7	33.1	33.5	33.9	34.3	34.6	34.6

Fjällräven is updating the fit of its apparel line; newer styles follow the New Fit charts while many existing styles use the original charts. Both are provided here so you can match the chart to the size run shown on the product.

Men's Pants & Shorts (Numeric Sizes):

EU Size	42	44	46	48	50	52	54	56	58	60
US Size	27-28"	29"	30-31"	32"	33-34"	36"	37"	38-39"	40"	41-42"
Waist	28.3	29.9	31.5	33.1	34.6	36.2	37.8	39.4	40.9	42.5
Seat	34.6	36.2	37.8	39.4	40.9	42.5	44.1	45.7	47.2	48.8
Inseam (Short)	29	29	30	30	30	31	31	31	32	32
Inseam (Regular)	31	31	31	32	32	33	33	33	34	34
Inseam (Long)	33	33	33	34	34	35	35	35	36	36
Inseam (Raw)	37	37	37	38	38	39	39	39	40	40

Men's Pants & Shorts (International Sizes):

Size	XS	S	M	L	XL	XXL	XXXL
Waist	28.3	30.7	33.1	35.4	37.8	40.2	42.5
Seat	34.6	37	39.4	41.7	44.1	46.5	48.8
Inseam (Short)	29	29	30	31	31	32	32
Inseam (Regular)	31	31	32	32	33	34	34
Inseam (Long)	33	33	34	34	35	36	36
Inseam (Raw)	37	37	38	38	39	40	40

Men's Pants & Shorts - New Fit (Numeric Sizes):

EU Size	42	44	46	48	50	52	54	56	58	60	62
US Size	28"	29"	30"	32"	34"	36"	38"	40"	42"	44"	46"
Waist	28.3	29.9	31.5	33.1	34.6	36.6	38.6	40.9	43.3	45.7	48
Seat	33.1	34.6	36.2	37.8	39.4	40.9	42.5	44.5	46.5	48.4	50.4

Men's Pants & Shorts - New Fit (International Sizes):

Size	XXS	XS	S	M	L	XL	XXL	XXXL
Waist	27.6	29.9	32.2	34.6	37.8	40.9	44.5	48.0
Seat	32.3	34.6	37.0	39.4	41.7	44.5	47.2	50.4

Inseam lengths: Short = 30", Regular = 32", Long = 34", Raw = 36" inner leg. Fjällräven offers many pant models in multiple inseam lengths - check the product page for the lengths available on each style. Where a length is not specified, men's pants follow the Long length.

Performance

How it ranks across conditions.

Calibrated against comparable products we stock, so you can compare like for like.

Warmth

1

2

3

4

5

Heavy brushed flannel, worn alone or as a mid layer

Durability

1

2

3

4

5

G-1000 reinforcement at the collar, cuffs and flaps

Breathability

1

2

3

4

5

Organic cotton moves moisture at rest and on easy days

Weather Resistance

1

2

3

4

5

Cotton flannel — no water resistance

Full spec sheet

Technical Specs

Body Fabric	100% organic cotton heavy flannel
Reinforcement	G-1000® — 65% recycled polyester, 35% organic cotton
Back Length	78 cm (size M)
Weight	440 g (size M)
Fit	Regular Fit

Find the right one for you

How the Singi Heavy Flannel Shirt compares

Head-to-head against the closest alternatives we stock, so you can see where this one sits before you commit.

Feature	Fjällräven Men's Singi Heavy Flannel Shirt You're viewing	Fjällräven Men's Ovik Down Shirt Jacket
Fabric	Organic cotton flannel	G-1000® with down fill
Insulation	None	800-fill recycled down
Weight	440 g	826 g
Best For	Everyday flannel warmth	Insulated outer shirt
	Pick your size	Shop →

Browse all flannel shirts →

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