Since its inception, the Fli-Lyte has remained a cornerstone in Topo's lineup, evolving with each iteration to better serve its intended purpose, thanks to a design philosophy centered around a broad, rounded toe box for shock absorption and stability. Unlike other brands that mold the midfoot for arch support, Topo designs allow for the natural compression and reshaping of the arch, facilitating a more natural foot function. While similar to Altra in the approach to a broad toe box for natural foot mechanics, Topo shoes typically feature a snugger heel fit and more defined arch shaping, distinguishing their design philosophy.

READ TOPO ATHLETIC FLI-LYTE 4 REVIEW

The Fli-Lyte 4 showcases significant updates from its predecessor, particularly in its upper construction, which is lighter and offers more freedom for toe movement without restrictive structures, complemented by a snug heel fit enhanced by the innovative design of the overlay that integrates with the laces. This version introduces Zipfoam in the midsole, offering increased durability and energy return over the previous EVA material, alongside additional outsole rubber for enhanced shoe longevity. The changes mark the Fli-Lyte 4 as a shoe designed for speed, with its light weight and initial firmness contributing to a perceived increase in cadence and overall performance.

With over 100 miles of testing revealing no significant wear, the Fli-Lyte 4 stands out as the fastest in the series, excelling in intervals, hill reps, and races, though its firmer feel may limit its versatility for longer, steady runs compared to models like the Topo Cyclone. The 3mm heel-to-forefoot drop and the strategic placement of the drop support natural toe spread upon impact, promoting a free and natural running experience. Despite its firmer midsole, the shoe has proven to be comfortable for slower recovery runs, maintaining good posture and quick cadence, underscoring the Fli-Lyte 4's specific design enhancements for quick, responsive running.

Topo say: From the pavement to the gym, Fli-Lyte 4 delivers lightweight versatility, making it your go-to shoe for up-tempo daily miles and your favorite workout. The sleek new upper features a recycled engineered mesh with zero overlays for lightweight security and a breathable, comfortable fit. New lace stays on the tongue keep it locked in place over the foot. The midsole gets an upgrade with ZipFoam™, delivering more response and resisting compression set over time. The widened 23 x 20 mm platform delivers and even smoother and more stable ride.

More Cushioning and Resilience

Proprietary midsole compound which is springier than EVA and offers more rebound over the life of the shoe.

3MM Drop

Our mid-level drop provides a near neutral platform for a more natural running experience.

Lightweight Breathable Materials

For a '2nd Skin' fit and feel.

Recycled Materials

Keeping sustainability in mind to help keep waste out of landfills.

• Road
• Stack Height:23mm (heel) // 20mm (forefoot)
• Heel to Toe Drop:3mm
• Weight:235g

Topo Style Guide

• Cushion:[Responsive/Balanced/Cushioned]
• Support:[Neutral/Light Stability]
• Pliability:[Flexible/Moderate/Firm]