"What Our Gearhead® Experts Are Saying:""The Whirlwind Jacket is that perfect ‘just in case’ layer I never leave behind. It’s light enough to stash in my pack or pocket, but once zipped up, it cuts the wind and sheds light rain like a champ. I love how it packs into its own pocket and straps onto my arm mid-run—super practical for variable conditions.""We’re ready for unpredictable weather with the Oiselle Whirlwind Jacket—a technical shell built for runners who embrace every mile, rain or shine. Crafted from wind- and water-resistant ripstop polyester, this lightweight jacket keeps us protected when the skies shift, without weighing us down. The thoughtful design makes it a trail and road essential: a full-zip front and elastic-bound hood offer quick coverage, while the longer rear hem keeps the elements off our back. Zippered hand pockets and an internal drop-in pocket secure small essentials, and when the sun reappears, the whole jacket packs neatly into its right pocket with an arm band for hands-free carry. Built with bluesign®-approved materials, the Whirlwind combines performance, packability, and eco-conscious construction for runners who go the distance."