The nike dunk low obsidian gym red white sail is one of the Massachusetts company’s all time best sellers. This four pack with ‘USA’ embroidery on their heels takes the 574 model to a new high by easy supple pig suede instead of the typical cow-derived nubuck. That’s a nice new feature, but perhaps not the key innovation for the pack. That might go to the marketing campaign, which features a website hosting some 480 video clips, one of each of these limited edition releases. If you get the joints when they drop this month, you can go to the 574 Clips website and match it to the photo with an alphanumeric code (and the colour, of course). Interesting stuff to draw attention to a stellar design; well done, New Balance. We’ll update you with an exact release date soon. Click the jump below for more photos and a list of retailers set to stock these.