Nike’s Updated ACG Zegama Finally Nails the Trail Fit With Vibram Grip and a Locked-In Feel

What the Last Change Actually Means

The headline isn't the outsole or the upper. It's the last. Runners World tester Chris Fisher called the shoe "very locked to your foot," and that's not marketing — it's the result of a revised last and an upper that cups the outer rim of your foot instead of just sitting on top of it. When you're torquing across uneven ground at mile 18, the shoe actively holds you in place. It crosses into stability-shoe territory without a medial post. For anyone who's rolled an ankle chasing vert, that's the entire point.

The modified gaiter-style collar flows into a more traditional tongue, with stretch in the upper that moves with your foot instead of fighting it. The stretch collar also blocks debris — a real win when you're slogging through mud season and don't want pebbles migrating into your socks every quarter mile. The large finger loop stitched into the heel means you can actually get the shoe on with wet, cold hands. You stop fighting the laces and start running.

Underfoot: Outsole and Cushion

The Vibram base with the aggressive checkmark lug pattern is where the Zegama earns its keep. The lugs dig deep and shed mud instead of packing full of gunk. On packed dirt, wet rock, and the sloppy singletrack that comes with shoulder season, the outsole held on every descent. I trusted it more than my own center of gravity on greasy downhills — and that's the only metric that matters when the trail turns to soup.

The cushioning strikes the right balance. Soft enough to protect your feet over long miles, connected enough that you're not running on mashed potatoes. For runners grinding through a muddy ultra buildup, that's the combination you need: protection without losing ground feel. The midsole geometry also keeps the platform stable even when the heel is digging in hard.

Where It Stumbles

The outsole geometry has a weak point. Around the heel, the lug pattern splits in an extension area, and you feel that split on downhills. Not a deal-breaker, but it's a tell. Nike still hasn't fully solved heel braking on aggressive descents, and if you run technical terrain at speed, you'll notice it every time you point your nose downhill.

Nike is pushing ACG hard to capitalize on the off-road boom, and the broader commerce shift across athletic gear is part of why the brand is suddenly paying attention to fit instead of just colorways. The ventilation balance here is a quiet win — breathable enough to stay comfortable, buttoned-up enough for genuinely cold stretches. For long runs, ultra training blocks, or anyone whose feet always run cold, this is the most complete Nike trail shoe in years. The old Zegama is officially obsolete.