The list of physical constants contains physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. This includes things like the speed of light in a vacuum, electron mass and the Wien entropy displacement law constant—whatever that is.

If you look at the UP THERE crew you'd be willing to add one other to the list—New Balance 990s. There's rarely a day goes by that at least one person isn't wearing these tried-and-true classics from New Balance.

Since its inception in the 1970s, the New Balance 990 series has seen some of the most iconic sneaker silhouettes ever made—all rendered in grey suede.

With the arrival of 2024, we've secured a whole host of 99x series models to get your year started properly. There's restocks on the heritage 996 and 998 models along with new drops of the contemporary 993, 990v4 and 990v6—including women's sizes.

We do our best to keep these in-stock when we can but they often sell-out pretty quickly. That means if you're looking for a new pair, now's the time...