Incredibly light, highly breathable, and easy to forget youre wearingthis cap was clearly built for moving fast and packing small.Outdoor Research says:The Swift Ultra Light Cap is the ultimate trail running and outdoor training hat, featuring a hybrid-mapped, ultralight design with maximum ventilation for pushing the pace in alpine or on the road.The Swift Ultra Light Cap’s hybrid-mapped design is made with an ultra-breathable bluesign approved polyester blend on the top of the crown and 100% recycled polyester on the side panels. The cap is designed to be crushable and packable to stuff into pockets and packs, and the drawcord closure at the back delivers a secure, adjustable fit. DWR finish and UPF 30 protect from the elements, and just the right amount of movement-mirroring stretch provides a precision fit and all-day comfort.With a firm focus on ultralight breathability and ventilation for fast-moving, high-tempo outdoor wear, the Swift Ultra Light Cap epitomizes lightweight, technical trail running gear.Our VerdictFeatherlight and effortlessly breathable, the Swift Ultra Light Cap feels purpose-built for fast movement and minimal pack weight. At just 39g in the small/medium size, it all but vanishes once it’s on. The hybrid fabric layout allows the crown to breathe freely while the recycled side panels channel airflow exactly where needed. On steep ascents and muggy mornings, it wicked sweat efficiently and dried out in no time.The crushable construction means you can stash it in a hip belt or vest pocket without a second thought. The drawcord closure offers a snug, bounce-free fiteven in strong windsand I appreciated the sleek, no-fuss design that doesnt scream technical gear.- Reviewed by Ultralight Outdoor GearFeaturesBreathableDWR TreatmentMovement Mirroring StretchQuick DryingUltralightUPF 30Water ResistantWicking2025 Updated FabricCrushableDrawcord ClosureHybrid Mapped ConstructionPackableSpecificationsSmall/Medium Weighs: 39gMedium/Large Weighs: 44gMaterial & ConstructionTop of Crown: bluesign approved 86% Polyester 14%Spandex Side Panels: bluesign approved 100% Recycled Polyesterbluesign Approved MaterialsHelp & advice:Recycled Content in Outdoor GearThe Bluesign System

Incredibly light, highly breathable, and easy to forget youre wearingthis cap was clearly built for moving fast and packing small.Outdoor Research says:The Swift Ultra Light Cap is the ultimate trai