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Seaweed Knowledge Fleece

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Seaweed Knowledge Fleece

From tidepools to far-flung shores, the Seaweed Knowledge Fleece dives deep into the wild, untamed wisdom of the sea. Featuring vintage scientific illustrations and oceanic insight, this crew is a tribute to the lesser-known life forms that thrive beneath the surface—and to those curious enough to seek them out. Knowledge isn’t just found in books—it’s floating just beneath the surface.

Product Care

Our products are crafted with precision and care, and with just a few simple steps, you can maintain their exceptional condition:

Uncover the benefits of the sea in style with Roark’s Seaweed Knowledge Sweatshirt. Featuring an educational seaweed illustration print on soft sand-colored fleece, this cozy crewneck blends comfort with curiosity and a taste for the wild.

Free Shipping

We offer free standard shipping on all orders over £100. After your payment is verified, most orders ship within one business day from our warehouse in the United Kingdom.

Shipping Policy

Returns & Exchanges

We offer easy returns within 30 days of purchase for items purchased from Roark and official Roark retail locations, excluding items that were on sale.

Returns Policy

Give Us A Shout!

We consistently put our gear through trials and tribulations. But we want to hear how our goods work out in the wild with you!

	XS	S	M	L	XL
SIZE (US)	0-2	4-6	8	10-12	14
DENIM SIZE	24-25	26-27	28-29	30-31	32
BUST	32.5-33.5	34.5-35.5	36.5-37.5	39	40.5-42
WAIST	24.5-25.5	26.5-27.5	28.5-29.5	31	32.5-34
HIP	35.5-36.5	37.5-38.5	39.5-40.5	42	43.5-45

SIZE	SIZE	HEIGHT	WAIST	HIPS	THIGH
X-SMALL	26/27	5'6" - 5'8"	28	35 1/2"	20 3/4"
SMALL	28	5'8" - 5'10"	28 1/2"	36"	21"
SMALL	30	5'8" - 5'10"	30"	37 1/2"	21 3/4"
MEDIUM	31	5'10" - 6'	31"	38 1/2"	22 1/4"
MEDIUM	32	5'10" - 6'	32"	39 1/2"	22 3/4"
LARGE	33	6' - 6'2"	33"	40 1/2"	23 1/4"
LARGE	34	6' - 6'2"	34"	41 1/2"	23 3/4"
X-LARGE	36	6'1" - 6'3"	36"	43 1/2"	24 3/4"
X-LARGE	38	6'1" - 6'3"	38"	45 1/2"	25 3/4"
XX-LARGE	40	6' 3" - 6'5"	40"	47 1/2"	26 3/4"

SIZE	HEIGHT	NECK	ACROSS SHOULDER	CHEST	SLEEVE LENGTH	BICEP
X-SMALL	5'6" - 5'8"	14" - 14 1/2"	16"	35" - 37"	30 1/2" - 31 1/2"	12 1/4"
SMALL	5'8" - 5'10"	14 3/4" - 15 1/4"	16 3/4"	37" - 39"	31 1/2" - 32 1/2"	12 3/4"
MEDIUM	5'10" - 6'	15 1/2" - 16"	17 1/2"	39" - 41"	32 1/4" - 33 3/4"	13 1/4"
LARGE	6' - 6'2"	16 1/4" - 16 3/4"	18 1/2"	42" - 44"	33 3/4" - 35 1/4"	14"
X-LARGE	6'1" - 6'3"	17" - 17 1/2"	19 1/2"	45" - 47"	34 1/2" - 36"	15"
XX-LARGE	6'1" - 6'3"	17 3/4" - 18 1/4"	21"	51"- 53"	34 1/2" - 36"	16 1/2"

SIZE	HEIGHT	NECK	ACROSS SHOULDER	CHEST	SLEEVE LENGTH	BICEP
X-SMALL	5'6" - 5'8"	14" - 14 1/2"	16"	35" - 37"	30 1/2" - 31 1/2"	12 1/4"
SMALL	5'8" - 5'10"	14 3/4" - 15 1/4"	16 3/4"	37" - 39"	31 1/2" - 32 1/2"	12 3/4"
MEDIUM	5'10" - 6'	15 1/2" - 16"	17 1/2"	39" - 41"	32 1/4" - 33 3/4"	13 1/4"
LARGE	6' - 6'2"	16 1/4" - 16 3/4"	18 1/2"	42" - 44"	33 3/4" - 35 1/4"	14"
X-LARGE	6'1" - 6'3"	17" - 17 1/2"	19 1/2"	45" - 47"	34 1/2" - 36"	15"
XX-LARGE	6'1" - 6'3"	17 3/4" - 18 1/4"	21"	51"- 53"	34 1/2" - 36"	16 1/2"

SIZE	SIZE	HEIGHT	WAIST	HIPS	THIGH
X-SMALL	26/27	5'6" - 5'8"	28	35 1/2"	20 3/4"
SMALL	28	5'8" - 5'10"	28 1/2"	36"	21"
SMALL	30	5'8" - 5'10"	30"	37 1/2"	21 3/4"
MEDIUM	31	5'10" - 6'	31"	38 1/2"	22 1/4"
MEDIUM	32	5'10" - 6'	32"	39 1/2"	22 3/4"
LARGE	33	6' - 6'2"	33"	40 1/2"	23 1/4"
LARGE	34	6' - 6'2"	34"	41 1/2"	23 3/4"
X-LARGE	36	6'1" - 6'3"	36"	43 1/2"	24 3/4"
X-LARGE	38	6'1" - 6'3"	38"	45 1/2"	25 3/4"
XX-LARGE	40	6' 3" - 6'5"	40"	47 1/2"	26 3/4"

Seaweed Knowledge Fleece