The Primus Lite IV is our original training all-rounder

Drawing inspiration from humanity's earliest foot coverings

All the style

a Mini Cork Ball for nerve stimulation

It includes Toe Spacers for alignment

PRIMUS TRAIL II FG MENS Men The Primus Lite IV isThe Primus Trail II Firm Ground is our original, best selling trail running sneaker. It's light, durable and flexible for wide ranging trail adventures that bring you closer to the earth. Continuously improved through athlete testing and material innovation, the Primus Trail II FG has nothing more or less than exactly what you need made with high performance, recycled, vegan* materials.