In this video, I’m reviewing the brand new Allbirds SuperLight Trainers—one of the lightest Allbirds shoes you can buy right now, and also one of their lowest carbon footprint options. I break down the colorways (Blizzard, Pure Azure, and Calm Cargo), sizing guidance (sizes 8–14, and go up at least a half size if you’re wide-footed), and the 30-day hassle-free return policy if you need to swap sizes. I also walk through the construction details: a breathable FSC-certified eucalyptus fiber mesh upper combined with recycled monofilament, a unique tongue design (half built-in, half detached), and laces/eyelets that sit on top of the upper instead of threading through it. Underfoot, you’re getting Allbirds’ SuperLight Foam—similar to their sugarcane-based SweetFoam, but nitrogen-infused to keep things lightweight and lower impact—plus natural rubber traction pads on the outsole. These have a 6mm heel drop and a flatter, stable profile, so I see them more as a gym/training shoe (CrossFit, HIIT, squats) than a commuting or running shoe. After my gym session, they performed well with no foot soreness, and overall they’re honestly one of my favorite-looking Allbirds models so far.