Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock SAS odor-resistant Tripad® Technology lend

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

Treadlite by UGG™ outsole for comfort

4 mm rubber Megagrip outsole for optimal performance on a variety of surfaces

Injection Molded EVA Construction

FLEXIBLE to enable natural movement

Vivobarefoot Womens Primus Trail Knit FG brand-Birkenstock SAS odor-resistant Tripad® Technology lendAll 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