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    Rendezvu
    On a mission to get more people to enjoy the outdoors© 2026
    RendezvuAboutFor HostsFor BrandsFor Shoppers
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    Brand: On

    Category: Running Tights & Pants

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

    Highlights: long distance, lightweight, warm, comfortable

    The On Men's Core Pants in Blue XL are designed for ultimate mobility and comfort, featuring a lightweight and stretchy fabric that adapts to your every move. With innovative ventilation openings, these pants ensure you stay cool and focused during your most intense activities. 1. Lightweight fabric that promotes unrestricted movement for active lifestyles. 2. Stretchy material blend for enhanced flexibility and comfort during workouts. 3. Overlap openings at the back of the knees for superior airflow and breathability. 4. Tailored fit that flatters while providing ample room for dynamic movements. 5. Moisture-wicking properties to keep you dry and comfortable during high-intensity sessions. 6. Versatile design suitable for both athletic and casual wear. 7. Durable construction that withstands rigorous use and maintains its shape. These pants are ideal for running, training, or any high-energy activities, providing the perfect balance of comfort and performance. Best suited for warm weather or indoor environments, they excel in scenarios requiring agility and breathability. Targeted towards fitness enthusiasts and athletes of all skill levels, the On Men's Core Pants are a reliable choice for those seeking both style and functionality in their activewear.

    Price: $120

    Expert Review

    These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.

    Recommended by Jeffrey Hammond

    Frequently asked questions

    What does Jeffrey Hammond say about the On Men's Core Pants?

    These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.

    Rendezvu
    On Men's Core Pants  Blue XL by On — recommended by Jeffrey Hammond
    Apparel

    On Men's Core Pants Blue XL

    Jeffrey Hammond
    Jeffrey HammondRecommended in “Fave Apparel”
    These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.
    Purchasing through this link directly supports Jeffrey
    Apparel

    On Men's Core Pants Blue XL

    Jeffrey Hammond
    Jeffrey HammondRecommended in “Fave Apparel”
    These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.
    Purchasing through this link directly supports Jeffrey
    On Men's Core Pants  Blue XL by On — recommended by Jeffrey Hammond

    Why does Jeffrey Hammond recommend On?

    Jeffrey Hammond recommends the On On Men's Core Pants for running tights & pants. These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.

    Is the On Men's Core Pants a good running tights & pant?

    Yes — Jeffrey Hammond recommends the On Men's Core Pants by On as their running tights & pants pick. These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.

    Is the On Men's Core Pants good for long distance?

    Jeffrey Hammond recommends it for long efforts: These quickly became one of my favorite pieces of gear for cold-weather running and long adventures. They're lightweight, comfortable, and do an excellent job of keeping me warm when temperatures drop without feeling bulky. I wore these during two overnight sections of Cocodona 250 when conditions were windy, cool, and less than ideal, and they performed exactly how I needed them to. They helped block the wind, stayed comfortable for hours on end, and continued to keep me warm even when conditions got damp. If you're looking for a reliable pair of running pants for early mornings, mountain weather, or long ultras, these are a great option that I've personally put through some serious miles.

    More from Jeffrey Hammond's Fave Apparel

    • Janji M's Sunchaser 50 Hooded Long Sleeve
    • Topo Designs Men's Sun Hoodie
    • REI ACG Lavaloops 9" Half Tights - Men's
    • Nike ACG "Lunar Ray"
    • Ciele Athletics GOCap - Comp - Century
    • Nike Stride
    • REI Weather Jacket Insulated - Men's
    • On Men's Ultra Jacket Limelight | Lime

    View Jeffrey Hammond's expert gear recommendations on Rendezvu