Head-to-Head
Mach 6vsGlycerin Flex
The Mach 6 and Glycerin Flex are both daily trainer shoes built for road running. The Mach 6 retails for $140 while the Glycerin Flex comes in at $170 — a $30 difference. The Mach 6 is the lighter shoe at 8.2 oz versus 9.1 oz for the Glycerin Flex. In our ratings, the Mach 6 edges out the Glycerin Flex — 9.0/10 versus 8.0/10.
| Rating | 9.0 / 10✓ | 8.0 / 10 | |
| Price | $140✓ | $170 | |
| Weight | 8.2 oz✓ | 9.1 oz | |
| Category | Daily Trainer | Daily Trainer | |
| Terrain | Road | Road | |
| Cushion | Medium | Medium | |
| Softness | Balanced | Balanced | |
| Drop | Medium | Medium | |
| Drop (mm) | 5 mm | 6 mm | |
| Stack | 37 mm | 36 mm | |
| Stability | Neutral | Neutral | |
| Fit | Narrow | Narrow | |
| Energy Return | Medium✓ | Low | |
| Breathability | Breathable✓ | Medium | |
| Traction | Medium | High✓ | |
| Shock Absorption | Medium | High✓ | |
| Durability | Decent | Good✓ |
