Rendezvu
    On a mission to get more people to enjoy the outdoors© 2026
    RendezvuAboutFor HostsFor BrandsFor Shoppers
    LegalTermsPrivacy
    ResourcesDocsContactFeedback
    CommunityInstagramLinkedInNewsletterCareers
    Rendezvu
    On a mission to get more people to enjoy the outdoors© 2026
    RendezvuAboutFor HostsFor BrandsFor Shoppers
    LegalTermsPrivacy
    ResourcesDocsContactFeedback
    CommunityInstagramLinkedInNewsletterCareers

    Brand: On

    Category: Running Headwear

    Recommended by Jeffrey Hammond, Foot Doc, ultrarunner, cool dad. — Provo, Utah

    Highlights: long distance, lightweight, breathable, warm

    The Core Beanie in Navy is your ultimate companion for cold-weather activities, designed with a unique ponytail opening for comfort and style. Its soft brushed lining and snug fit ensure warmth and protection during your outdoor adventures. 1. Made from high-quality, breathable fabric that retains heat while allowing moisture to escape. 2. Features a convenient ponytail opening, perfect for runners and outdoor enthusiasts with longer hair. 3. Soft brushed lining provides exceptional comfort against the skin, preventing irritation during extended wear. 4. Head-hugging fit ensures the beanie stays securely in place, even during vigorous activities. 5. Lightweight and packable design makes it easy to carry in your pocket or backpack for on-the-go warmth. 6. Versatile navy color complements a variety of outdoor outfits and styles. 7. Machine washable for easy care and maintenance, ensuring longevity and freshness. The Core Beanie is ideal for outdoor running, hiking, or any cold-weather activity where warmth and comfort are essential. It performs best in chilly conditions, making it perfect for fall and winter excursions. Designed for active individuals, this beanie excels in scenarios such as morning jogs, weekend hikes, or casual outings, providing both functionality and style.

    Price: $28

    Expert Review

    This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.

    Recommended by Jeffrey Hammond

    Frequently asked questions

    What does Jeffrey Hammond say about the Core Beanie?

    This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.

    Rendezvu
    Core Beanie Navy by On — recommended by Jeffrey Hammond
    Apparel

    Core Beanie Navy

    Jeffrey Hammond
    Jeffrey HammondRecommended in “Accessories Galore: The Little Things That Matter”
    This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.
    Purchasing through this link directly supports Jeffrey
    Apparel

    Core Beanie Navy

    Jeffrey Hammond
    Jeffrey HammondRecommended in “Accessories Galore: The Little Things That Matter”
    This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.
    Purchasing through this link directly supports Jeffrey
    Core Beanie Navy by On — recommended by Jeffrey Hammond

    Why does Jeffrey Hammond recommend On?

    Jeffrey Hammond recommends the On Core Beanie for running headwear. This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.

    Is the Core Beanie a good running headwear?

    Yes — Jeffrey Hammond recommends the Core Beanie by On as their running headwear pick. This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.

    Is the Core Beanie good for long distance?

    Jeffrey Hammond recommends it for long efforts: This is a simple piece of gear that does exactly what I want it to do. While it's a little snug on my larger head, I found it to be the perfect balance of warmth and breathability. I wore it during some cold overnight sections of Cocodona 250, and it kept me comfortable without ever feeling too hot. One thing I really appreciated was how well it worked with my headlamp—it stayed securely in place, and after a few miles I completely forgot I was wearing it. For runners looking for lightweight warmth on chilly mornings, mountain adventures, or overnight ultras, this beanie is an easy win.

    More from Jeffrey Hammond's Accessories Galore: The Little Things That Matter

    • Nike Expedition Shield
    • Garmin fenix 8 AMOLED Sapphire Black 43 Mm
    • Suunto Wing 2 Coral
    • On Core Glove
    • On Shoe Pack Magnet
    • Salomon Adv Skin 12 Hydration Vest Khaki
    • Black Diamond Spot 400 Headlamp
    • UltrAspire Lumen 400z 2.0 Waist Light

    View Jeffrey Hammond's expert gear recommendations on Rendezvu