Allbirds just launched a long-distance running sneaker that's lightweight, sustainable, and made with the brand's new cushioning technology

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• Allbirds just launched the Tree Flyer, its first long-distance running sneaker.
• The Tree Flyer uses Allbirds' newly-innovated bio-based SwiftFoam midsole to better reduce impact.
• The Allbirds Tree Flyer is available now in five colors for men and women ($160).

Allbirds is no longer just a startup with trendy, sustainable fashion sneakers. With a catalog full of performance styles, including the widely popular Tree Dasher 2, Trail Runner SWT, and a groundbreaking collaboration with Adidas, Allbirds can now be regarded as a bonafide sportswear brand too. If the aforementioned silhouettes weren't enough to prove its sportswear prowess, Allbirds' latest running sneaker — the Tree Flyer — will remove all doubt.

Designed to be Allbirds' first performance running sneaker for long-distance, the Tree Flyer is easily the most technical sneaker from the brand. It features Allbirds' all-new cushioning technology called SwiftFoam. Made from a planet-friendly blend of natural and recycled materials, SwiftFoam is lightweight and bouncy, helping to return energy to the runner and eliminating the repeated harsh impact long-distance runners typically experience.

The upper features a variety of sustainable materials, including eucalyptus tree fiber knit construction, merino wool heel counters, and recycled plastic laces. The design also uses a recycled plastic heel counter for stability. Despite having substantially more cushioning, the Tree Flyer is nearly 1 ounce lighter than the Tree Dasher 2.

For its initial release, the Allbirds Tree Flyer is offered in five colors — Natural Black, Blizzard, Buoyant Yellow, Buoyant Orange, and Lux Beige. Available now for $160, the Tree Flyer comes in men's sizes 8-14 and women's sizes 5-11, with options for half sizes.

Insider Reviews is currently testing out the Allbirds Tree Flyers on long-distance runs, so check back later for our in-depth review.