The Eliot Racer is still being fine-tuned before its launch....The most intriguing aspect of the Eliot Racer is its energy return system. The shoe will come with two sockliners: one for training and one for race day....
At this point, the ingredients of a super shoe are well-known: carbon-fiber plate, high energy foam, aggressive geometry. There are also those rules every marathoner tries to follow: lay out your gear the night before, start out slow, nothing new on race day. That last rule was the driving force behind the Eliot Racer....
Instead of reserving super shoes for race day, the urge to train in them has become irresistible.... This is where “freeing the foam”—the two sockliners—comes in. The “training sockliner” gives athletes reassurance throughout their training by allowing them to log workouts in their racing shoe. The second sockliner, which is more responsive and has more cushioning, provides athletes with a fresh platform on race morning.... Instead of PEBA, which is what the Eliot Runner midsole is composed of, TPU foam is used to sandwich the carbon-fiber plate. (You can see it after removing the sockliner.) The TPU closer to the ground is more durable and slightly harder, whereas the TPU in the sockliner is more responsive and has more give.
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