Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock Injection Molded EVA Construction

Injection Molded EVA Construction

Treadlite by UGG™ outsole for comfort

Zoned 90% recycled polyester sheet insulation for warmth even in wet weather

FLEXIBLE to enable natural movement

Superior grip on icy surfaces and cold terrain

Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock Injection Molded EVA ConstructionAll sales are final. Returns for store credit only. The Primus Trail Knit is an evolution of the Primus Trail FG: our original, best selling trail running sneaker. It features a knit upper for enhanced breathability and purer trail mobility, made with recycled materials, and a sock like construction to keep out trail debris. Product Info Firm Ground outsole Stand firm on multiple terrains. ORTHOLITE INSOLE The Ortholite Performance Insole is made of