Which of the following sustainability initiatives was FIRST successfully implemented by a major sports retailer?

In recent years, major sports brands have been racing to implement sustainability initiatives to reduce their environmental footprint. From recycled materials to reduced packaging, these companies are innovating in various ways. Test your knowledge about which pioneering sustainability practice was actually implemented by a major sports retailer, and which ones haven't quite made it to market yet.

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Adidas' Futurecraft.Loop - fully recyclable performance running shoes where the entire shoe can be ground up and remade into new shoes
Nike's self-disassembling sneakers that automatically separate into recyclable components when placed in a special recycling bin
REI's carbon-negative store design that actively removes more carbon from the atmosphere than it produces
Under Armour's biodegradable performance fabric that decomposes completely within 6 months after disposal