Amazon.com | Vivobarefoot Primus Trail Knit FG Mens 。The Vivobarefoot Primus Trail FG Men\'s US9 Black Minimalist Barefoot Running Shoes are designed for outdoor activities such as trail running, hiking, walking, and gym workouts. Featuring a lightweight, breathable, and flexible sole, these sneakers offer a wide toe box, zero drop design, and firm ground traction. This shoe is a strong all-terrain barefoot shoe that balances flexibility, comfort,grip and ground-sensitive sole that enhances natural movement on rough terrain. The lace-up closure ensures a secure fit, while the minimalist barefoot trainer silhouette provides comfort and support. Made with vegan materials and recycled polyester mesh upper, these shoes are perfect for the active man looking for performance and natural movement in their footwear.