Topo Athletic Ultrafly 5 Running Shoe – Men's vest A soft midweight knit construction

A soft midweight knit construction traps heat without bulk

Slip-on construction with traditional lacing system

DWR-treated shell sheds light moisture and condensation to keep the insulation performing through the night

High-pile fleece construction delivers lightweight warmth that's genuinely soft against skin — no scratchy liner to fight with

triangle Coolmax gusset boosts breathability and mobility

Topo Athletic Ultrafly 5 Running Shoe – Men's vest A soft midweight knit constructionBuilt for daily training and long run days, the Ultrafly 5 is our pick for runners who want a natural ride without sacrificing cushion. A wide toe box lets your foot splay naturally, while a low 5mm drop keeps your stride efficient. Available in standard and wide widths to fit more feet right. 5mm drop with generous midsole cushion natural ride that won't beat you up on back to back training days Wide toe box design lets toes spread and splay