Feels like getting tis NB 574 sonic weld.
Grey one....easier matching.
Uniquess of this sneaker......
The Sonic welded collection is a new series of colors and textures and the first New Balance shoes made with a sonic welding process.
Sonic welding utilizes tremendous heat and pressure to create an airtight (and watertight) seal using significantly less labor
than is required for traditional stitching.
On a conventional shoe, if a stitch detail comes undone, the shoe starts to fall apart. The Sonic [welded] 574 doesn’t have this problem,
because there’s no stitching. It’s also probably one of the most comfortable and breathable shoes I’ve ever worn
because there’s no glue used in the shoe’s upper.
^from some site.
