Swiftwick Aspire Five Mid-Crew is engineered with an ultra-thin profile for a precise, race-ready fit. Signature Olefin fibers manage moisture to help keep feet cool, dry, and blister-free, while the sock’s contour-hugging design supports the arch to reduce fatigue on tempo days, long runs, and races.

• Ultralight, breathable construction: Thin profile delivers a close-to-foot feel for responsive ground feedback and shoe fit.
• Olefin moisture control: Hydrophobic fibers move sweat away from skin to help minimize hot spots and blisters.
• Arch-supporting fit: Contours to the foot to promote stability and reduce fatigue over sustained efforts.
• Mid-crew height: Added coverage and a secure hold around the ankle and lower calf.
• Run-focused comfort: Smooth, low-bulk knit designed for lasting comfort from intervals to marathon distance.