A Glow in the Dark Debut: Ja Morant’s Fourth Signature Shoe Lands in Obsidian and Voltage Green

Nike readies the Ja 4’s first colorway for an August 18 Japan release, built around the guard’s cut and burst style of play.

Every signature shoe has to answer a question the last one didn’t quite finish asking, and for Ja Morant, that question has always been speed. His game lives in the gap between a defender’s first step and his own, the burst that turns a stationary possession into a dunk before help can rotate over. Nike built its first three signature models around that identity, and the fourth, arriving in a colorway called Nightmare, doesn’t so much reinvent the formula as sharpen it.

The shoe releases August 18 in Japan under style code IM4135-405, priced and distributed through Nike’s usual regional channels. It’s the debut color for the silhouette, the one meant to introduce the model before the brand starts layering in player exclusives and team colorways later in the year. Debut colorways tend to carry a certain responsibility: they have to look like a complete idea on their own, not a placeholder waiting for something bolder. Nightmare leans into that by going moody rather than loud, which is its own kind of statement for a shoe built around an explosive athlete.

Basketball player holding mint-green and black Nike basketball shoes.

There’s also a bit of theater built into the timing. Launching a debut colorway called Nightmare just as the offseason winds down and training camps start filling arenas again gives the release a natural runway into the season, when Morant himself will presumably be lacing up an early pair for actual games rather than campaign photography. That alignment between release calendar and season calendar isn’t unique to this shoe, but it does explain why Nike tends to treat these August windows as more than a routine restock month.

stir

The name does most of the storytelling. A dark, almost obsidian tone sits across the forefoot and gradually opens into a voltage green that spreads back toward the heel, the kind of two-tone shift that photographs differently depending on the light hitting it. Under an arena’s overhead rig, the green reads almost electric against the black. In flatter daylight, it settles into something closer to a sil with a pulse still running through it.

Texture jures as big a role as color here. The upper isn’t a flat panel; it carries a fine, uneven surface that catches light unevenly across the shoe rather than reflecting it in one clean sheet. Running along the side is a vertical Swoosh, a detail that has become something of a signature placement across the Ja line rather than a one-off design choice, alongside a wrapping TPU cage the shoe calls its JA-FRAME. That frame isn’t decorative. It’s meant to keep the foot locked down during the kind of hard cuts and step backs that define Morant’s handle, giving the upper structure exactly where lateral stress tends to concentrate.

It’s worth pausing on how deliberately restrained the color story actually is compared to some of the brighter, multi-panel signature shoes currently on shelves. Plenty of basketball silhouettes chase attention through sheer volume of color blocking. Nightmare instead commits to a single gradient and lets the texture and hardware carry the visual interest, a choice that reads as more confident than cautious once you see it in person rather than in a flat product shot.

floor

Nike’s cushion strategy for the Ja 4 splits the job between two materials rather than asking one foam to do everything. CUSHLON 3.0 handles the bulk of the midsole, prioritizing responsiveness over plush softness, the kind of setup built for players who want to feel the floor rather than sink into it. Layered on top is a lightweight, supercritical foam sock liner Nike brands SPRPWR, added specifically to sharpen the rebound on drives and cutbacks rather than general standing comfort.

 

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The outsole picks up where the frame and cushioning leave off. Its traction pattern is cut for quick directional changes rather than straight line speed alone, and a foam ridge runs along both edges of the sole, adding durability in the spots most likely to take a beating from lateral loads and incidental contact under the rim. None of it is revolutionary on its own. Together, though, it reads as a shoe engineered specifically around change of direction rather than raw vertical explosion, which tracks with how Morant actually creates his advantages on the floor.

clue

Context matters here more than it might for a less established signature model. The Ja 3 established the performance identity the Ja 4 is now building on rather than replacing, and each new numbered release has tended to push the silhouette toward a more aggressive, more graphic visual language while keeping the underlying support structure largely intact. Nightmare fits that pattern. It isn’t a soft reset of the line so much as a confident restatement of what the previous model already got right, dressed in a colorway with enough personality to stand on its own as a debut release.

Signature lines rarely get judged fairly in their opening weeks. Early reception tends to focus almost entirely on colorway and silhouette, since on court performance data simply hasn’t accumulated yet. By the time a fourth numbered model arrives, though, there’s enough history to actually compare against, and the Ja line has built a reasonably consistent identity around control and change of direction rather than pure jump height, a lane that separates it from some of the more airborne signature shoes currently competing for shelf space.