I've said it before, and I'll say it again. Adidas makes the most comfortable sneakers ever — and it's all because of Boost technology.

After I was introduced to the cushioning technology in 2015, I went on a bit of a Boost craze, racking up nine sneaker purchases over the next three years. I bought one pair of Yeezy Boost 350s, three pairs of Yeezy Boost 350 V2, two pairs of NMD R1 Primeknits, and three pairs of Ultra Boosts. While the Ultra Boosts were the easiest to acquire and the least valuable, they were easily my favorite.

They had, in my opinion, everything that makes up a perfect shoe. A lightweight and breathable Nike Air Max 2015 Femme Primeknit upper, a full-length Boost midsole, plenty of support and rigidity from the Torsion plate and rear heel cups, and an overall look that's both sporty and casual. I would wear them to the gym and on normal days when comfort was a priority and I never thought twice about wanting an improved design from Adidas — that was, until the Ultra Boost 19 released.

Compared to the original Ultra Boost, which consists of 17 individual pieces, the newly designed Ultra Boost 19 features four key performance pieces — a one-piece Primeknit 360 upper, an updated torsion spring, a 3D-printed heel frame, and last but not least, a Boost midsole with 20% more Boost.

I personally saw great improvements between the original and V2 versions of the Yeezy Boost 350, which is a lifestyle sneaker, so I was very eager to see how Adidas could improve Adidas ZX Flux Damen on a true performance shoe like the Ultra Boost. The brand sent me a pair of the Ultra Boost 19s to test out, and I was thoroughly impressed with all the updates that went into the redesign.

The short answer is yes. In my experience with sneakers, any time a brand can minimize a shoe's design, it usually makes for a more comfortable shoe — and such is the case with the Ultra Boost 19. Not once have I ever complained about my original Ultra Boosts being uncomfortable, but after wearing the Ultra Boost 19, it shows there was room for improvement after all.

My first impression when putting the Ultra Boost 19 on was that it fits bigger (more true to size) than the original Ultra Boost. I always went a half size up for Ultra Boosts and they still fit on the small side. I went a half size up for the Ultra Boost 19, assuming that Nike Air Max 90 Mujer they'd fit the same, but I probably could have gone with my normal size.

Based on size 9 shoes, the Ultra Boost weighs in at 11 ounces, while the Ultra Boost 19 weighs in at 10.3 ounces. On paper, that might come across as a trivial difference in weight, but I was definitely able to feel the difference while holding them in my hands and wearing Nike Air Max 2016 Femme them on my feet.

Although the general rule of thumb for running sneakers is the lighter, the better, I was initially concerned that making an already light shoe even lighter would take away from its structural integrity. But after wearing the Ultra Boost 19 for a while, I found out that they're still extremely stable.

This is the first Adidas sneaker I've worn with Primeknit 360 material and it's more form-fitting and stretchier than the normal Primeknit. These characteristics make the material lighter without sacrificing stability. I also really like how the heel frame is a rigid 3D printed outline rather than a solid piece of plastic. It's great to see Adidas stay ahead of the innovation curve by employing modern production methods like 3D (and even 4D) printing.

The lace cage is also lighter, although I believe it's Nike Air Huarache Femme always been used as a clever way to incorporate Adidas' Three Stripes branding rather than a means for structural integrity —which is why the brand has released equally sturdy Uncaged versions in the past.