Dual Lacing, Refined — Experience enhanced comfort and control with our signature TUNEDFIT™ Dual Lacing System. Now with two cinch cords per shoe, you can adjust the fit around the forefoot and midfoot independently in seconds. Paired with a wide toe box, it lets your toes splay, flex, and power through the longest runs in the toughest terrain. Dries Fast, Built to Last — Crafted from a high-performance woven fabric and reinforced with aramid fibers that are five times stronger than steel, the T1’s upper is relentlessly durable. Its anti-siphon knit tongue repels water, ensuring a breathable, fast-drying design that thrives in the harshest conditions. Midsole Mastery — LightCELL™, our proprietary PEBA-hybrid midsole, is turbocharged through supercritical foaming. LightCELL™ weighs just 50 percent of EVA while offering 45 percent greater energy return – it’s battle-tested by hundreds of ultrarunners for consistent responsiveness, mile after mile. The T1’s outsole features a trio of Vibram® innovations: Megagrip rubber for tenacious traction in any condition, Litebase for 30 percent less weight without compromising performance, and Traction Lug micro-features for up to 25 percent more grip. Best For: Long-distance trail races. Upgraded TUNEDFIT Dual Lacing System for separate lace adjustment. LightCELL midsole base featuring excellent lightness and bounce. Vibram Megagrip, Litebase, and Traction Lug technology. High-performance woven fabric upper reinforced with aramid fibers. Upper: High-performance woven fabric, DuPont™ Kevlar® fibers. Lug Depth: 4mm. Stability: Moderate. Cushion: Plush.
