Originally released in 2004 as a precursor to Nike Flyknit, the Sock Dart features a first-of-its-kind circular knit upper. The Fragment Design x Sock Dark ‘Obsidian’ is a 2015 collaboration with fragment design founder Hiroshi Fujiwara, presenting a straightforward design. A navy knit upper, complemented by a translucent strap, sits on a molded white midsole, while fragment design branding is strictly limited to the custom sockliner.
| Release Date | 01-29-2015 |
| SKU | 728748 400 |
| Nickname | Obsidian |
| Colorway | Obsidia/Summit White |
| Main Color | Blue |
| Category | Running |
| Designer | Mark Smith |