Patagonia Hydropeak 18 in Boardshorts-Blue Sage View full product details

Patagonia Hydropeak 18 in Boardshorts-Blue Sage

198077592129

$47.40

$47.40 $79.00

Sale save $31.60 (40% off)

Size 30 31 32 33 34 36 38

* Chest is usually the best size predictor. If your hip measurement is larger, consider the size indicated for your hips.

** Hips are usually the best size predictor. If your waist measurement is larger, consider the size indicated for your waist.

Standard inseam may vary by product. Please see the product page.

Women's Tops and Bottoms

Alpha Size	Numeric Size	Chest*	Waist	Hip**
XXS	00	31.5 in	24.5 in	34 in
XS	0	32.5 in	25.5 in	35 in
XS	2	33.5 in	26.5 in	36 in
S	4	34.5 in	27.5 in	37 in
S	6	35.5 in	28.5 in	38 in
M	8	36.5 in	29.5 in	39 in
M	10	37.5 in	30.5 in	40 in
L	12	39 in	32 in	41.5 in
L	14	41 in	34 in	43.5 in
XL	16	43 in	36 in	45 in
XL	18	45 in	38 in	47 in
XXL	20	47 in	40 in	49 in
XXL	22	49 in	42 in	51 in

* Chest is usually the best size predictor. If your hip measurement is larger, consider the size indicated for your hips.

For bottoms, hips are usually the best size predictor. If your waist measurement is larger, consider the size indicated for your waist.

Standard inseam may vary by product. Please see the product page.

Men's Tops

Alpha Size	Chest*	Hip	Arm Length
XXS	33 in	32 in	30 in
XS	35 in	34 in	32 in
S	37 in	36 in	33 in
M	40 in	39 in	34 in
L	44 in	43 in	35 in
XL	47 in	46 in	36 in
XXL	50 in	49 in	37 in
XXXL	56 in	55 in	37.5 in

Men's Bottoms (Alpha)

Alpha Size	Waist	Hip*
XXS	26 in	32 in
XS	28 in	34 in
S	30 in	36 in
M	33 in	39 in
L	36 in	42 in
XL	39 in	45 in
XXL	42 in	48 in
XXXL	45 in	51 in

Men's Bottoms (Numeric)

Numeric Size	Waist	Hip*
28	29 in	35 in
29	30 in	36 in
30	31 in	37 in
31	32 in	38 in
32	33 in	39 in
33	34 in	40 in
34	35 in	41 in
35	36 in	42 in
36	37 in	43 in
38	39 in	45 in
40	41 in	47 in
42	43 in	49 in
44	45 in	51 in

Women's Wetsuit Sizing

Size	Height	Chest	Waist	Hips	Inseam
XS	5'3"–5'6"	32.5–33.5	25.5–26.5	34–36	29–30
S	5'3"–5'6"	34.5–35.5	27.5–28.5	37–38	29–30
ST	5'7"–5'8"	34.5–35.5	27.5–28.5	37–38	31–32
MS	5'0"–5'3"	36.5–37.5	29.5–30.5	39–40	27–28
M	5'3"–5'6"	36.5–37.5	29.5–30.5	39–40	29–30
MT	5'7"–5'8"	36.5–37.5	29.5–30.5	39–40	31–32
L	5'3"–5'6"	39–41	32–34	41.5–43.5	29–30
XL	5'3"–5'6"	43–45	36–38	45–47	29–30
XXL	5'3"–5'6"	47–49	40–42	49–51	29–30

Men's Wetsuit Sizing

Size	Height	Chest	Waist	Hips	Inseam
XS	5'7"–6'0"	36–37	28–29	35–36	31–32
S	5'7"–6'0"	38–39	30–31	37–38	31–32
MS	5'3"–5'6"	40–41	32–33	37–38	29–30
M	5'7"–6'0"	40–41	32–33	39–40	31–32
MT	6'1"–6'3"	40–41	32–33	39–40	33–34
LS	5'3"–5'6"	42–43	34–35	41–42	29–30
L	5'7"–6'0"	42–43	34–35	41–42	31–32
LT	6'1"–6'3"	42–43	34–35	41–42	31–32
XLS	5'3"–5'6"	46–48	38–40	44.5–46.5	29–30
XL	5'7"–6'0"	46–48	38–40	44.5–46.5	31–32
XXL	5'7"–6'0"	50–52	42–44	48.5–50.5	31–32

Wetsuit Boot Sizing

Boot Size	Men's	Women's
5	5	6
6	6	7
7	7	8
8	8	9
9	9	10
10	10	11
11	11	12
12	12	13
13	13	14

* Chest is usually the best size predictor. If your hip measurement is larger, consider the size indicated for your hips.

Gender Inclusive Tops

Alpha Size	Numeric Size	Chest*	Waist	Hip
XXS	26	34 in	26 in	33 in
XS	28	36 in	28 in	35 in
XS	29	37 in	29 in	36 in
S	30	38 in	30 in	37 in
S	31	39 in	31 in	38 in
M	32	40 in	32 in	39 in
M	33	41 in	33 in	40 in
L	34	42 in	34 in	41 in
L	35	43 in	35 in	42 in
L	36	44 in	36 in	43 in
XL	38	46 in	38 in	44.5 in
XL	40	48 in	40 in	46.5 in
XXL	42	50 in	42 in	48.5 in
XXL	44	52 in	44 in	50.5 in
3XL	46	54 in	46 in	52.5 in
3XL	48	56 in	48 in	54.5 in

Infants & Toddlers

Age	Weight	Length
Newborn	up to 7 lbs	up to 20 in
0-3M	7-15 lbs	21-24 in
3-6M	15-20 lbs	25-27 in
6-12M	20-25 lbs	28-31 in
12-18M	25-28 lbs	31-33 in
18-24M	28-32 lbs	33-35 in
2T	28-32 lbs	35 in
3T	32-35 lbs	38 in
4T	35-40 lbs	41 in
5T	39-42 lbs	44 in

Kids'

Alpha Size	Numeric Size	Height	Weight	Chest	Waist	Hip
XS	(5-6)	46.5 in	45 lb	24 in	23 in	25 in
S	(7-8)	52 in	65 lb	26.5 in	24.5 in	27.75 in
M	(10)	55.5 in	78 lb	27.5 in	25.5 in	29 in
L	(12)	58.5 in	95 lb	28.5 in	26.5 in	30.5 in
XL	(14)	61.5 in	108 lb	30.5 in	28 in	32 in
XXL	(16-18)	66.5 in	130 lb	33.5 in	31 in	35 in

Hats

Size	Head Circumference
One Size	21.75 - 24 in
Small/Medium	21.75 - 22.75 in
Large/X-Large	22.75 - 24 in

* Japan measurements are in centimeters.

Socks

Size	Women's USA	Men's USA	UK	Europe	Japan*
X-Small	—	—	—	—	—
Small	4-6½	—	2-4½	34-37	21-23
Medium	7-9½	6-8½	5-7½	38-41	23½-25½
Large	10-12½	9-11½	8-10½	42-45	26-28½
X-Large	—	12-14½	11-13½	46-49	29-32½

Capacity Guide

Capacity	Best For
5–20 liters	Whatever you need for a short outing.
21–35 liters	A small pack for a full-day on the go.
36–50 liters	Best for overnights or technical day trips.
51–65 liters	Built for weekends or a few days away from home.
66–74 liters	For a week-long excursion or when you need extra room for gear.
75–100 liters	Best for weeks-long or intensive travel.

Packs & Travel Bags Sizing & Dimensions

Pack	Gear Capacity	Dimensions	Weight	Torso	Waist
Atom Daypack 24L	1,465 cu. in.	16 x 12 x 7	1 lb 5.2 oz	—	—
Atom Sling 8L	488 cu. in.	13.5" x 9" x 3"	12oz.	—	—
Atom Tote Pack 20L	1220 cu. in.	16" x 12" x 5"	1 lb. 7 oz.	—	—
Black Hole® Waist Pack 5L	305 cu. in.	16" x 6.5" x 4.5"	11.1 oz.	—	—
Black Hole® Micro MLC® 22L	1,343 cu. in.	18 x 12 x 7.5	1 lb 14.7 oz	—	—
Black Hole® Cube 3L	283 cu. in.	10.5" x 3.5" x 5.5"	3.8 oz.	—	—
Black Hole® Cube 6L	366 cu. in.	11" x 4.3" x 7"	6.7 oz.	—	—
Black Hole® Cube 14L	854 cu. in.	14" x 5.9" x 11"	10.2 oz.	—	—
Black Hole® Mini MLC® 30L	1831 cu. in.	20" x 12" x 7"	2 lb. 13 oz.	—	—
Black Hole® MLC 45L	2746 cu. in.	22" x 14.5" x 7.6"	3 lb. 10 oz.	—	—
Black Hole® Pack 25L	1465 cu. in.	18.8" x 11" x 5.9"	22.58 oz.	—	—
Black Hole® Pack 32L	1953 cu. in.	20.5" x 11" x 8.3"	1 lb. 11 oz.	—	—
Black Hole® Tote 25L	1526 cu. in.	11" x 16" x 8"	13.8 oz.	—	—
Black Hole® Gear Tote 61L	3722.5 cu. in.	14.5" x 22.5" x 14.1"	1 lb. 14 oz.	—	—
Fieldsmith Hip Pack 5L	305 cu. in.	10.5" x 6.25" x 3.5"	8.5 oz.	—	—
Fieldsmith Roll-Top Pack 32L	1953 cu. in.	29" x 20" x 7"	1 lb. 15.4 oz.	—	—
Fieldsmith Lid Pack 28L	1709 cu. in.	20" x 13" x 6"	1 lb. 11.2 oz.	—	—
Fieldsmith Linked Pack 24L	1465 cu. in.	18" x 11.5" x 7"	1 lb. 6.9 oz.	—	—
Haulsmith Pack 44L	2685 cu. in.	24" x 13" x 10"	2 lb. 9.3 oz.	—	—
Kids' Refugito Daypack 12L	732 cu. in.	13" x 10" x 5.5"	10.8 oz.	—	—
Kids' Refugito Daypack 15L	915 cu. in.	14.5" x 11" x 6"	11.5 oz.	—	—
Kids' Refugito Daypack 18L	1098 cu. in.	15.75" x 11.8" x 5.9"	1 lb. 2 oz.	—	—
Refugio Daypack 26L	1587 cu. in.	18" x 12" x 7.5"	1 lb. 7.5 oz.	—	—
Refugio Daypack 30L	1831 cu. in.	18" x 12" x 9"	1 lb. 10.9 oz.	—	—
Refugio Daypack 32L	1953 cu. in.	21" x 12" x 11"	1 lb. 12.2 oz.	—	—
Recycled Market Tote	1220 cu. in.	15" x 12" x 6"	9.3 oz.	—	—
Recycled Oversized Tote	3356 cu. in.	18" x 20" x 8"	14.4 oz.	—	—
Terravia Mini Hip Pack 3L	183 cu. in.	8" x 2" x 4.5"	3.9 oz.	—	—
Terravia Sacoche 3L	183 cu. in.	10 x 8 x 1.5	3.9 oz.	—	—
Terravia Tote Pack 24L	1465 cu. in.	16" x 10" x 8"	14.8 oz.	—	—

Capacity Guide

Capacity	Best For
5–20 liters	Whatever you need for a short outing.
21–35 liters	A small pack for a full-day on the go.
36–50 liters	Best for overnights or technical day trips.
51–65 liters	Built for weekends or a few days away from home.
66–74 liters	For a week-long excursion or when you need extra room for gear.
75–100 liters	Best for weeks-long or intensive travel.

Duffels & Wheeled Bags Sizes and Dimensions

Bag	Gear Capacity	Dimensions	Weight
Black Hole® Duffel Bag 40L	40L	50 x 32 x 22 cm	1045 g
Black Hole® Duffel Bag 55L	55L	58 x 34 x 24 cm	1180 g
Black Hole® Duffel Bag 70L	70L	66 x 36 x 28 cm	1365 g
Black Hole® Duffel Bag 100L	100L	74 x 38 x 34 cm	1595 g
Black Hole® Matte Wheeled Duffel 40L	40L	55 x 37 x 28 cm	3521 g
Black Hole® Matte Wheeled Duffel 70L	70L	69 x 33 x 37 cm	4100 g
Black Hole® Matte Wheeled Duffel 100L	100L	81 x 36 x 41 cm	4780 g
Black Hole® Mini MLC® 30L	30L	51 x 30 x 18 cm	1276 g
Black Hole® MLC® 45L	45L	56 x 37 x 19 cm	1644 g
Guidewater Duffel 80L	80L	84 x 40 x 41 cm	538 g

Delivery Free Shipping

Available on orders of $100 or more. Excludes boards and oversized items.

Shipping details Extended holiday returns Return through Jan. 24, 2027

Eligible purchases Nov. 6–Dec. 24, 2026. Exclusions apply.

Returns & Exchanges

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From Patagonia

Leveled-up, everyday boardshorts that are built to perform, featuring 86% recycled polyester/14% spandex fabric with streamlined four-way stretch. These lightweight, slim-fit, quick-drying surf shorts are for the surfer who desires more speed in their maneuvers but isn't opposed to a laidback point break breeze. Outseam is 18". Made in a Fair Trade Certified factory.

Lightweight and quick-drying 4.8-oz 86% recycled polyester/14% spandex with four-way stretch and a durable water repellent (DWR) finish made without intentionally added PFAS
Performance fit with a contoured waistband that's designed to move
A textured drawcord at the waist helps to keep the knot secured and your trunks on in heavier surf
One back-right patch pocket features a key loop and drainage holes, with a flap and hook-and-loop closure
Smooth, chafe-free seams
Outseam length is 18"
Made in a Fair Trade Certified factory, which means the people who made this product earned a premium for their labor

Patagonia Hydropeak 18 in Boardshorts-Blue Sage

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