The new GEL-DS Trainer® 23 model has undergone a bit of a makeover in it’s latest iteration, but that doesn’t mean that it has sacrificed any of the performance. The new Adjustable Slit Upper wraps and supports the foot, while also reducing the weight of the shoe. Updated DuoSole® outsole has increased durability while maintaining the weight & ride that you have come to love. Weight: 8.4. Heel Height: 20mm. Forefoot Height: 10mm.