Unisex R.A.D®️ Synth

The R.A.D® SYNTH is a remarkably lightweight road running shoe engineered to handle daily miles and uptempo efforts.

This versatile workhorse balances snappy energy return with a locked-in, racing-style upper. Compared to the maximum-cushioned R.A.D® UFO and other plush trainers on the market, the SYNTH features a firmer, more stable platform that delivers a highly connected ground feel. Despite its responsive nature, it still offers excellent underfoot protection—effortlessly absorbing hard concrete pounding and turning it into an optimized, fluid training flow that is perfect for stacking high-mileage weeks.

What to love:

• Lightweight streamlined workhorse for stacking miles.
• A firmer, more responsive ride, yet with great protection and a nimble feel.

UPPER

Racing-Style Locked-In Fit: A sleeker, lower-volume silhouette that mimics a race-day flat.

Lightweight Engineered Mesh Upper: Wraps tightly to ensure zero foot slippage during tight turns or hard accelerations.

Strategic Venting: Outfitted with targeted ventilation zones across the upper to enhance continuous airflow, keeping feet cool and dry when workout intensity peaks.

MIDSOLE

Supercritical SwellFoam™: A custom TPEE and 40% bio-based EVA blend. This supercritical foam sits on the firmer side, delivering snappy, responsive energy return and an intimate ground feel rather than a soft, sinking cushion.

Stable Smooth Ride: Engineered for structural durability and unwavering stability across the entire pace spectrum, effortlessly handling daily miles on the road.

Low-Profile Geometry: An athletic 6mm heel-to-toe drop that encourages natural forward momentum and fluid foot mechanics.

OUTSOLE

Herringbone Sticky Rubber: Signature textured rubber outsole featuring a classic herringbone tread—globally recognized as the highest-performing traction pattern on the planet—for absolute confidence across concrete, asphalt, and light gravel.