“Biodegradable” is vague. “Compostable” has rules. For plastics, existing standards in Europe set clear expectations: timely breakdown in industrial composting conditions. Nothing toxic left behind. No heavy metals. No visible fragments. The end product must be safe for plants.
There’s no composting standard designed for sneakers—yet. So, instead of waiting for one, we developed our own. We took inspiration from existing plastic and packaging standards but set our own criteria for every part of a SOLK: the leather, laces, sole, and more. We define the composting timescale, run the process ourselves, and then send the resulting compost for independent lab testing to confirm its clean.
From the shredder’s roar to the rocket’s hum, with Uncle Norbert watching over, every SOLK is fading into something new.