![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_375/cms/4CXQ1372WxFKhnNDfzRjOS/ffdbff25f37c596dc9925c0130db32e4/TreePiper-M-BTF-App-01.png)
TREE UPPER
Light And Breezy
Our proprietary knit feels silky smooth, breathable, and pleasantly cool thanks to eucalyptus tree fiber responsibly sourced from FSC® Certified forest.
![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_860/cms/25iAki7nMC1LfeQ5yafPEt/05ef520b74be9f2a781531d222591a1c/TreePiper-M-BTF-01.png)
![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_375/cms/2siGD0tokmh05XEN28EsWW/bf239f61057ac7e1b8795a9572786b6b/TreePiper-M-BTF-App-02-v2.png)
SUSTAINABLE STYLE
Evolution Of A Classic
Eucalyptus fibre, oversized accents and an embroidered collar turn this throwback-inspired low top into an environmentally conscious sneaker that never goes out of style.
![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_860/cms/5hS4MRCfHq07tC21oPF3nP/c111c533bc7c9688fdb8a3cdeb933d30/TreePiper-M-BTF-02_v2.png)
![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_375/cms/5x6BFfMyfJSQ2v2VKF4tcF/2547bd2e390b0cf2533f7cf1e4622f2d/TreePiper-M-BTF-App-03.png)
SUGARCANE MIDSOLE
Sweet On The Planet
Contoured and delightfully bouncy, our Brazilian sugarcane midsole is called SweetFoam®, which is made with the world’s first carbon negative green EVA.
![](http://cdn.allbirds.com/image/upload/f_auto,q_auto,w_860/cms/53dSsEgNC2nuYx9t4W3anq/d9dc0752acc0b272de10a9aaa4684515/TreePiper-M-BTF-03.png)