Topo Athletic Ultrafly Running Shoe – Women's Color:Black/Fuchsia High-fill responsible down insulation in

High-fill responsible down insulation in an internal baffled construction eliminates cold spots and delivers serious warmth-to-weight performance in sub-zero conditions

the Fresh Foam X 840v1 is our pick for daily training and all-day wear

Merino wool construction regulates temperature in cold conditions while actively wicking sweat away from skin

5-inch inseam with athletic hip-and-thigh fit strikes the right balance between coverage and freedom of movement

Built for runners who want merino performance without extra bulk

Topo Athletic Ultrafly Running Shoe – Women's Color:Black/Fuchsia High-fill responsible down insulation inBuilt for runners who log serious daily miles without sacrificing comfort, the Ultrafly is our pick for road training that actually fits the way feet are shaped. A 5mm drop midsole delivers balanced cushioning with enough ground feel to keep your stride honest, while the anatomical toe box lets your forefoot spread naturally for better stability over the long haul. 28mm heel 23mm forefoot stack with 5mm drop enough cushion for long runs without