Allbirds’ Tree Runner NZ Delivers A Fresh Take On A Fan-Favorite

Core Concept - Allbirds is launching the Tree Runner NZ, an updated version of its original Tree Runner, focusing on enhanced comfort, sleek design, and sustainability [1][5] Product Features - The Tree Runner NZ features an updated SweetFoam™ midsole with a new underfoot contour, providing a stack height of 10.2mm at the forefoot and 20.0mm at the heel for a supportive stride [2] - It includes a wool-blend collar and tongue lining for a snug fit, enhancing comfort [2] - A new dual-density insole combines cushioned memory foam with a wool-blend sockliner for long-lasting comfort, validated through extensive testing of over 45 variations [3] Design Philosophy - The redesign emphasizes comfort, fit, and material quality, representing a new era of Allbirds design characterized by bold simplicity and modern sustainability [4] - The upper is made from a tree knit fiber blend, combining TENCEL™ Lyocell and recycled polyester, ensuring breathability and durability [4] Brand Heritage and Availability - The "NZ" in Tree Runner NZ reflects Allbirds' New Zealand heritage, with the product priced at $110 USD [5] - The Tree Runner NZ became available in stores on July 8, 2025, and online on July 15, 2025 [5] Company Overview - Allbirds, founded in 2015, is committed to creating footwear using natural and recycled materials, focusing on superior comfort and sustainability [6]