# Sun Hats for Hiking and Fishing (2026): Brim Width, Neck Capes and Chin Straps > Six UPF 50+ sun hats for trail and water, compared on brim width in inches, neck capes, chin cords and the UPF test each maker names. What 3 inches of brim buys you. - Source: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing - Publisher: WildProofLab (https://wildprooflab.com) - Published: 2026-09-29 - Category: sun-heat - Tags: sun hats, UPF 50 hat, fishing hat, hiking hat, neck cape, boonie hat, wide brim hat - Method: picks chosen from Amazon listings and brand specs; not hands-on tested; current Amazon prices are on the page; content checked 2026-09-29. - Quick answer: Buy the Sunday Afternoons Ultra Adventure if you want one hat for trail and boat: UPF 50+ fabric tested to AATCC 183, a 6 in neck cape and a chin strap. For the most brim per ounce of money, the Coolibar SafeShade has a 4.5 in front brim, a 10 in neck flap and a removable chin cord. ## Key takeaways - The Skin Cancer Foundation only puts its seal on adult hats with at least a 3 in brim all the way round, or a 3 in bill with a neck and ear drape. - A baseball cap leaves the ears and back of the neck bare. On open water, add a neck cape or flap, because glare comes up off the water as well as down. - Wind takes hats on boats and ridgelines: buy one with a chin cord or strap, and tighten the crown drawcord first. ## Products (chosen from listings, not tested) 1. **Sunday Afternoons Ultra Adventure Hat, UPF 50+** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B09H7N1P62) — Buy it if you want full neck coverage and a hat that stays on in wind. - Pros: UPF 50+ fabric, a 3.25 in reverse split brim and a 6 in neck cape, per the listing; Internal sizing system and adjustable chin strap; side mesh panels and a sunglass lock; Water and stain repellent finish; folds flat, per the listing - Cons: The cape is sewn on; on a cool morning you wear it or you tuck it 2. **Coolibar SafeShade Wide Brim Sun Hat, UPF 50+** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0H676N4WG) — Buy it for the widest brim and neck flap here, especially on the water. - Pros: 4.5 in front brim, 4 in side brim and a 10 in center-back neck flap, per the listing; Removable chin cord, adjustable elastic cord and toggle, moisture-wicking sweatband; LiteGuard nylon with guaranteed UPF 50+, per Coolibar - Cons: One size, 23.6 in (about US 7 1/2) circumference, so smaller heads rely on the cord 3. **Coolibar Leo Wide Brim Hiking Hat, UPF 50+** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B01F2F4RVK) — Buy it for hiking if you want a shapeable brim that meets the 3 in rule all round. - Pros: Brim 3.9 in at the front and 3.1 in at the sides and back, per the listing; Three sizes (22.4, 23.2 and 24 in circumference); drawcord and toggle at the back of the crown; Adjustable chin cord and an internal wicking sweatband - Cons: No neck cape; the 3.1 in back brim is the only neck cover 4. **Columbia Coolhead Zero IV Booney** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0FB36RR9T) — Buy it for humid days on the water when you want a cape you can stow. - Pros: Omni-Shade UPF 50, a 3.5 in brim and a packable cape, per Columbia; Adjustable chin strap; Omni-Freeze Zero fabric that Columbia says reacts with sweat to feel cooler; Sold in sizes rather than one size; this listing is S/M, so check the size before you buy - Cons: The cooling claim is Columbia's; it depends on you sweating 5. **Tilley LTM6 Airflo Sun Hat** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0026PGKN8) — Buy it if you paddle and want a fitted hat that floats. - Pros: Rated UPF 50+; buoyant; DWR finish; hidden pocket, per the listing; Recycled nylon with a mesh vent band; sold in fitted sizes such as 7 1/4 to 7 5/8; Guaranteed for life, per the listing - Cons: The listing gives no brim width, and there is no neck cape 6. **Columbia Bora Bora Booney** (details: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0CLPP4KMM) — Buy it as a light spare, not as your only hat for open water. - Pros: Omni-Shade UPF 50 and an extra-wide brim, per the listing; Mesh venting and an Omni-Wick sweatband; packs into a bag - Cons: Adjustable drawcord, and the listing names no brim width or neck cape A sun hat is the one piece of gear that covers the places sunscreen misses most: scalp, ears, the rims of the ears and the back of the neck. For hiking you want brim and airflow; for fishing you also want neck cover, because light comes back up off the water. The deciding numbers are brim width in inches, whether there is a cape or flap, and whether a cord holds it on in wind. **How we chose:** we did not test these hats; we compared brim measurements, UPF ratings and the test each maker names, and kept only hats sold by Amazon.com or the brand's own store and in stock on September 29, 2026. ## Six sun hats side by side | Hat | Brim (per maker or listing) | Neck cover | Wind retention | UPF | Sold by | Amazon price | |---|---|---|---|---|---|---| | [Sunday Afternoons Ultra Adventure](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B09H7N1P62) | 3.25 in, reverse split | 6 in cape | Chin strap | 50+ | Sunday Afternoons Inc. | see the current Amazon price on the page | | [Coolibar SafeShade](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0H676N4WG) | 4.5 in front, 4 in sides | 10 in back flap | Removable chin cord | 50+ | Coolibar | see the current Amazon price on the page | | [Coolibar Leo](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B01F2F4RVK) | 3.9 in front, 3.1 in sides and back | Brim only | Chin cord | 50+ | Coolibar | see the current Amazon price on the page | | [Columbia Coolhead Zero IV](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0FB36RR9T) | 3.5 in | Packable cape | Chin strap | 50 | Amazon.com | see the current Amazon price on the page | | [Tilley LTM6 Airflo](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0026PGKN8) | Not on the listing | Brim only | Fitted sizes | 50+ | Amazon.com | see the current Amazon price on the page | | [Columbia Bora Bora](https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing#product-B0CLPP4KMM) | "Extra wide," no figure | Brim only | Drawcord | 50 | Amazon.com | see the current Amazon price on the page | The Coolhead Zero IV figures come from [Columbia's product page](https://www.columbia.com/p/coolhead-zero-iv-booney-2159191.html); the rest come from each Amazon listing. ## Why 3 inches of brim is the line The [Skin Cancer Foundation's Seal of Recommendation](https://www.skincancer.org/seal-of-recommendation/) sets the plainest rule we found: an adult hat needs a brim of at least 3 in all the way round, or a 3 in bill with a drape over the neck and ears. The fabric must also be at least UPF 50. That rule sorts the table quickly. The Coolibar SafeShade (4.5 in front, 4 in sides) and Leo (3.9 in front, 3.1 in elsewhere) clear it on brim alone. The Sunday Afternoons Ultra Adventure and the Coolhead Zero IV get there with a brim plus a cape. A baseball cap does not. It shades the forehead and nose, and leaves the ears and neck in full sun. If you must wear a cap for a helmet or a fly line, pair it with a hooded sun shirt; our [sun shirt and hoodie guide](https://wildprooflab.com/sun-heat/upf-sun-shirts-and-hoodies) covers hoods that fit under a cap. ## What UPF 50+ means on a hat UPF is measured through the fabric. The Skin Cancer Foundation's [sun-protective clothing page](https://www.skincancer.org/skin-cancer-prevention/sun-protection/sun-protective-clothing/) says a UPF 50 fabric "blocks 98 percent of the sun's rays and allows two percent (1/50th) to penetrate." In the US the lab test is AATCC TM 183, and labeling follows ASTM D6603. The test lab Hohenstein [explains](https://uv-protection.hohenstein.com/en/testing-certification/american-standard-aatcc-tm-183) that TM 183 measures new, unstretched, dry fabric, which is why a maker that also tests wet fabric is worth noting. Sunday Afternoons is the one maker here that names its test. Its [FAQ](https://www.sundayafternoons.co.uk/pages/faqs) says all its materials are "tested at independent labs in accordance with AATCC 183-2014," and that it works with a certified agency "to evaluate our fabrics wet and dry." Coolibar, Columbia and Tilley give the UPF figure but not the method on these listings. A UPF number covers only the fabric. Mesh vent panels, like those on the Ultra Adventure, Bora Bora and Tilley, let air in and some light too, so they sit on the crown, where the brim shades them. ## For fishing: neck cover and glare off the water On a boat or a flat, sun reaches your neck from behind and bounces up off the water under the brim. A neck cape or flap is what fixes the first; sunglasses and a hooded shirt or [neck gaiter](https://wildprooflab.com/sun-heat/cooling-towels-and-neck-gaiters) help with the second. The **Coolibar SafeShade** has the most neck cover of the six: a 10 in center-back flap under a 4 in side brim, per the listing. It is one size, 23.6 in round, with an elastic cord and toggle to take it in. Coolibar pitches it for "fishing, boating, hiking, work outdoors," and that is where the long flap earns its keep. The **Sunday Afternoons Ultra Adventure** pairs a 6 in neck cape with what the listing calls a 3.25 in "reverse split brim," shielding "your face, ears, and neck." The chin strap and internal sizing make it the steadiest here in wind. The **Columbia Coolhead Zero IV Booney** is the humid-day choice. Columbia gives it a 3.5 in brim, a chin strap and a cape that packs away. Its Omni-Freeze Zero fabric, Columbia says, has "blue rings" that "react with sweat to lower the temperature of the fabric so you feel cooler." We cannot confirm the effect; the sun protection is the UPF 50 rating. ## For hiking: brim, airflow and fit On a trail, a hat you can see past and that does not trap heat matters more than a cape. The **Coolibar Leo** has the most even brim for walking, 3.9 in at the front and 3.1 in at the sides and back, and comes in three sizes from 22.4 to 24 in, per the listing. The adjustable chin cord keeps it on when you look down a switchback. The **Tilley LTM6 Airflo** is sold in fitted hat sizes such as 7 1/4, 7 1/2 and 7 5/8, so measure your head before you order. The listing says it is buoyant and has a DWR finish, which makes it a good paddling hat: it floats if the wind takes it. The **Columbia Bora Bora Booney** is the lightest-feeling pick and packs into a bag, but its listing gives no brim width and it holds on only with a drawcord. We would keep one in the car, not wear it as the only hat on a boat. Related: [sun gloves and arm sleeves for fishing](https://wildprooflab.com/sun-heat/sun-gloves-and-arm-sleeves-for-fishing) cover the hands and forearms a hat cannot. ## Sizing and wind Measure around your head about a finger's width above the ears, where the hat will sit. Coolibar prints circumference on the Leo listing (22.4 in S/M, 23.2 in L/XL, 24 in XXL); Tilley sells by traditional hat size; the SafeShade is one size at 23.6 in. A hat that fits loosely will lift in a gust even with a cord. Take up the crown adjuster first (the Leo's rear drawcord, the Ultra Adventure's internal sizing), then use the chin cord for the gusts. ## Care and how long a hat lasts Sunday Afternoons says in its [UPF explainer](https://www.sundayafternoons.com/blogs/sunday-blog/what-is-upf-meaning-ratings-and-why-sun-protection-matters) that a UPF-rated fabric keeps its rating "whether it's dry or wet," unlike sunscreen, which washes off. The water-repellent finishes on the Ultra Adventure and the Tilley are a different matter: DWR wears with use, so a hat that used to bead water may start to soak through before its UPF changes. Tilley's lifetime guarantee is the only warranty stated on these listings. For the others, check the maker's care label before you machine wash a hat with a stiffened brim. Sunscreen still goes on the face and ears under any hat. Our [sunscreen guide for outdoor sports and work](https://wildprooflab.com/sun-heat/sunscreen-for-outdoor-sports-and-work) explains the FDA's water-resistance labels and how often to reapply. ## Frequently Asked Questions ### Does a straw hat count as a sun hat? Only if the weave is tight. The Skin Cancer Foundation's clothing page says densely woven fabrics protect better than loosely woven ones; if you can see daylight through the straw, UV gets through too. None of the six hats here is straw. ### Is a darker hat better? For the fabric, often yes. The Skin Cancer Foundation says dark or bright colors absorb UV instead of letting it through. A light hat can still be UPF 50+ if it was tested that way, and it will feel cooler in direct sun. ### Can I wear a sun hat under a bike or climbing helmet? Not a brimmed one. Wear a thin cap or a hooded sun shirt under the helmet, and switch to a brimmed hat at the stops. ### How do I pick a size between two? Go by the maker's chart. Coolibar gives inches for each size on the Leo; if you fall between, the crown drawcord can take up a larger size, but it cannot stretch a small one. --- *WildProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Brim widths and ratings are the makers' own.* ## Sources - columbia.com: [Columbia's product page](https://www.columbia.com/p/coolhead-zero-iv-booney-2159191.html) - Skin Cancer Foundation: [Skin Cancer Foundation's Seal of Recommendation](https://www.skincancer.org/seal-of-recommendation) - Skin Cancer Foundation: [Sun protective clothing](https://www.skincancer.org/skin-cancer-prevention/sun-protection/sun-protective-clothing) - uv-protection.hohenstein.com: [Explains](https://uv-protection.hohenstein.com/en/testing-certification/american-standard-aatcc-tm-183) - sundayafternoons.co.uk: [FAQ](https://www.sundayafternoons.co.uk/pages/faqs) - sundayafternoons.com: [UPF explainer](https://www.sundayafternoons.com/blogs/sunday-blog/what-is-upf-meaning-ratings-and-why-sun-protection-matters) --- Last updated: 2026-09-29 Canonical URL: https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing How to cite: "Sun Hats for Hiking and Fishing (2026): Brim Width, Neck Capes and Chin Straps", WildProofLab, https://wildprooflab.com/sun-heat/sun-hats-for-hiking-and-fishing (checked 2026-09-29). Disclosure: as an Amazon Associate WildProofLab earns from qualifying purchases. Safety information summarizes public guidance and is not medical advice.