mixed terrain Allbirds Tree Flyer 2 running shoes review: super-eco-friendly shoes for shorter runs The Allbirds Tree Flyer 2 is a second generation running shoe with a joyfully low carbon footprint, designed for 10ks but capable of so much more Can you use trail running shoes on the road? We explain when you can use your trail shoes on tarmac, and uncover the best hybrid shoes for mixed terrain Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors MOST READ1"The most surprising thing was how calm I stayed" – Maine skier buried up to his neck in rare in-bounds avalanche 2Veja Condor 3 review: an everyday road runner with impressive ethical credentials3[READY TO CHECK] Patagonia Women’s Chambeau Rock Pants review: lightweight trousers with a comfortable waistband45 reasons you need a multitool for your outdoor adventures5What causes afternoon thunderstorms in Colorado’s Rockies – and what does it mean for hikers?