Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock Zoned 90% recycled polyester sheet

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

Superior grip on icy surfaces and cold terrain

Injection Molded EVA Construction

cotton-core wicks

SAS odor-resistant Tripad® Technology lend additional support to the three primary pressure points of the foot

Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock Zoned 90% recycled polyester sheetAll 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