Adidas Ultra Boost, the best of all?

Presented yesterday in New York in great pomp, Ultra BOOST is, if one believes adidas, "the most advanced running shoe ever made." Runners.fr tested the exclusive gem of the three stripes. And gives you advice on running THE big new winter 2015 ...No need to rush you into your favorite store soon finished reading this article. Indeed, the new adidas Ultra BOOST ™, officially unveiled to the press and to the world yesterday afternoon, will be available for sale until February 25 (possible pre-orders from 11 February on the Adidas website) . Runners.fr had the chance to test this shoe presented by the brand as "the most advanced running shoe ever designed" premiere. With such an anthem, as saying that the three stripes and big set up the bar very high, with the risk that the fall is especially harsh reality to be in too much difference with advertising. Is that the case ?
A concentrate of technologyUltra BOOST ™ is unlike any other shoe brand. It is above all a superb technological object. As the name suggests, it incorporates the now famous amortized BOOST ™ (last test to date, that of adios 2) but adds, dare I say, a layer with 20% more full-BOOST somehow. But that's not all, far from it.The outsole (Stretch Web) is amazing: a pattern layout of a thin elastic and perforated plastic with protruding spikes, studs arranged along the bending lines. But what about the mesh, changing Primeknit technology, a single piece of knitted elastic mesh, he married completely the foot shape and deforms with it during movement (in the image of the Nike Free Flyknit). A second skin (so it should not be too over-prune for purchase). The lacing system only serves to bring more or less, depending on your sensitivity, the two lateral retaining elements in the form of the "three stripes". The bead is reinforced by an outer plastic shell ensures the maintenance in the center of the stroke, without causing internal friction.
ComfortableI made four trips with Ultra BOOST ™: jogging at a moderate pace, a split session on basis of 300 meters, a working session in rib and an output of long 1:30. Not enough to judge the sustainability of intriguing studs-studs of the sole but enough to make me a good idea of ​​the shoe.Ultra BOOST ™ is not easy to put on and he did not hesitate to openly pull the rear tongue to successfully enter the foot. Once it inside, what strikes first is absolute comfortable fit. The knitted mesh is pressed against the front and middle of the foot to the image of a sock. By forcing the line on all sides, we quickly realized its elasticity, it follows the movement and foot deformities.Personally, I have no need of lateral support, so I realized my test with very loose laces (I would have been removed). By cons, if you are not used, you can flatten more closely the elements of lateral reinforcements thus obtaining a footwear "classic." The shell around the heel well fixed it in the axis of the race but without forcing it.
catchy

The outsole is particularly eye-catching. If it produces a rather unusual and it may at first seem a bit harsh, associated with the amortized BOOST ™, its mechanical behavior is perfect. On one hand, it is impossible to find fault, whatever the road conditions; secondly, it provides therefore taken very safe supports a stride more effective in spite of an apparently footwear narrow at the front (but remember its elastic properties).
Pleasant

Ultra BOOST ™ is not suitable for runners follower of zero-drop. In midfoot attack, we feel that the heel is not off the ground, which quickly proves troublesome. By cons, flat attack of the foot or heel, the rider will benefit not only all the benefits of BOOST ™ technology already mentioned on Runners.fr on many occasions (important cushioning coupled with energy return for a propulsive effect ), but also the specific design of the sole (over BOOST ™, more flexibility) that induces an acceleration of the transition back-> before for smooth, efficient stride, which "flows naturally" in some way. Hence enjoyable sessions especially at a moderate pace.

yes but dynamic ...

As always with the BOOST ™, enticed one is by the effect under the heel, made with a power that "feels" really, we said we would like in a little under 'before. So it's true that there are more than on adios but we do feel a real plus in split or for example ribs. For the Ultra BOOST ™ gives its full potential, we must place a complete stride cycle with its attack on thick and pulse on the front.Add to this that it is not an ultra-lightweight model (330 g in 45 1/3), so it's a shoe, which, in my opinion, will be perfectly at ease on the constant look sessions moderate to semi-marathon speed. Ideal for urban runners but also for runners of all weights in search of a driving off road split. In competition, it seems ideal for the half marathon.