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  • Plus, the browband wicks away excess moisture, so your skin stays dry, cool and comfortable
  • Great for river use™lightweight construction and foam brim keep the hat afloat during "man overboard" drills
  • Adjustable drawcord ensures the hat remains in place on windy days
  • Machine wash cold, tumble dry low; do not bleach


Sizing information for head circumference is as follows:

  • Medium fits 22-1/2 in.
  • Large fits 23-1/4 in.
  • X Large fits 24 in.

View all Outdoor Research Men's Sun Hats

REI membership


Best Use Multisport
Hat Style Sun Hat
Fabric 86% nylon/14% polyester
Sun-Protective Fabric Yes
UPF Rating 50
Moisture Wicking Yes
Quick Drying Yes
Width Of Brim 2.6 inches
Gender Unisex

Size chart

Sizing notes

Measure around your head where the headwear would fit comfortably.

Rated 4 out of 5 by from Great shield for the sun, but no ventilation mesh I loved the wide brim and thin material of this Helios model, and have previously owned OR brand hats that lasted over a decade. This lightweight hat was great for keeping the sun off of my face and neck, but without any ventilation mesh on the sides it was really hot to wear. Even in direct sunlight (90-100+F in SoCal), removing the hat made my head feel instantly cooler. I returned it (Without hassle) and exchanged it for OR's "Transit" model, which has continuous mesh on the sides and back. I'd recommend this, but with the no-ventilation disclaimer.
Date published: 2014-08-04
Rated 4 out of 5 by from Pleased with this choice This was a great choice for backpacking 12 days in the New Mexico sun. Was lightweight and comfortable. Crushed in my backpack, when taken out it bounced right back to its original shape - especially after a soaking rain. Not listed as waterproof, but did an acceptable job of keeping light rain out of my face. Usually my head is big for hats, but I followed the sizing guidlines and XL felt a just a touch big. This really wasn't a problem as the cinch at the back completely corrected the fit and in retrospect, I was probably appreciative of the slightly looser and more ventilated fit. At the end of the hike the hat was filthy, but came completely clean in the wash. The style is a little nerdy and floppy, but in that kind of sun, function over style is definitely called for.
Date published: 2013-07-19
Rated 4 out of 5 by from Great hat - but pink discoloration from sweat First this is a great hat. I bought for a week long hike in the Davis Mountains of west Texas to help provide additional shade and then also used on the rivers of Missouri. After the first few days however I noticed discoloration where I was sweating. The color actually became somewhat pink in color. Before writing this review I checked other reviews on REI and other sites and no one else seems to be citing this problem so I'm hopeful I just had a defective hat and will be exchanging when I get home for the same as I really do like the hat, but have an obvious problem with discoloration.
Date published: 2014-07-08
Rated 3 out of 5 by from Keeps the sun off. This is a great lid for your grape in cooler times. I live in Arizona and bake in this hat from March through October - the months when I need it the most. This is a durable hat that will adjust to fit your head perfectly. I have had mine for over a year now and it holds up and holds its shape wonderfully. Like I said though - THERE IS NO VENTILATION. No mesh, no holes, no clever flaps or anything of the sort.
Date published: 2008-03-07
Rated 4 out of 5 by from sizing is off and its little warm I bought this to have a full brimmed hat while hiking and backpacking. The hat its self is great, keeps the sun out of my face, ears and partially covers my neck. It’s light and fast drying. BUT the sizes do run little off. I normally wear a xl hat but had to get a large due to the xl being way too big BUT the large fits a little tight also. When I start to sweat it stretches the hat a little and loosens up. Also It’s a tad bit warm, with no venting holes on the sides. Only other thing I would like to have on the hat is Velcro or clips on the side to put the side brim up instead of using the chin strap to hole the side brim. All in all it’s a great hat and its staying with me when I go out hiking camping backpacking or 4x4
Date published: 2015-07-03
Rated 5 out of 5 by from Keeps the sun off, breathable I'm a letter carrier, and I use this hat on every sunny day in the warm weather. It keeps the sun off of my face, neck, and ears. It is very breathable, more so than my baseball cap. The material seems strong. I am very happy with this purchase. The brim tends to lose it's shape, but that's to be expected with a soft brimmed hat.
Date published: 2013-08-22
Rated 3 out of 5 by from Floppy Fedora The hat would be great except for the floppy brim. It rides the wind too much to be of any use in windy conditions. A moderate to brisk breeze lifts the brim up and exposes the face to the sun.
Date published: 2008-07-10
Rated 4 out of 5 by from nice quality Quality seems better than other hats I've had. Agree that it is a bit nerdy but it serves it's purpose. I measured 24in for hat size which is xl for this hat, but it still seems a bit large (drops down over my ears. sort of have to tuck them in) but after using the cinch it feels comfortable. So far seems to be a keeper.
Date published: 2013-09-14
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What is the size (W x H) of the "OR" embroidery on the front of the hat?

Asked by: Cacciatto
​The logo on the Helios Hat measures 44.2 (W) x 18 (H) millimeters.
Answered by: REIservice
Date published: 2017-03-14

What is the size (L x H) of the "OR" embroidery on the front of the hat?

Asked by: Cacciatto
​The logo on the Helios Hat measures 44.2 (W) x 18 (H) millimeters.
Answered by: REIservice
Date published: 2016-08-30
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