Marathon race
S/Lab Phantasm 3 Sc
A lightweight road racing shoe with a PEBA-based optiFOAM+ midsole and full-length carbon plate built for distance races.
$250MSRP
Comparable specifications
Use these measurements to compare shoes on equal terms.
- Terrain
- road
- Primary use
- Marathon race
- Races
- Half to marathon
- Also good for
- Half marathon race, 10K race, 5K race, Tempo / threshold
- Cushion
- high
- Weight
- 175g
- Drop
- 6mm
- Stack
- 39/33mm
- Plate
- carbon
- Midsole
- PEBA based optiFOAM+
- Outsole
- Road contaGRIP
- Upper
- single layer mesh
- Widths
- standard
Tempo workoutsSpeed intervalsHalf marathonRoadLightweightMarathonRace dayCarbon plate
Our read
A dedicated marathon and half-marathon racer for efficient runners who want a very light, snappy carbon plate shoe and don't need daily-trainer versatility.
Ride
The PEBA-based foam and full-length carbon plate produce a responsive, propulsive ride at speed with a moderate 6 mm drop.
Fit
Regular width with a single-layer engineered mesh upper and integrated gaiter, giving a snug, minimal race fit with little structure.
Best for
Marathon and half-marathon racing where low weight and a stiff, propulsive toe-off matter most.
Avoid if
You want an all-around trainer, need a wider fit, or prefer a stable, forgiving platform for easy mileage.
Sources
What informed our read. We link out rather than reproduce others’ reviews.

