Not eco friendly, but I have this one from Amazon which is great: https://www.amazon.com/gp/product/B08MW688YR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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It's unavailable, but this one looks similar https://www.amazon.com/Wildken-Pannier-Backpack-Multifunctional-Backseat/dp/B08V1V72WQ/ref=sr_1_148_sspa?dchild=1&keywords=pannier+backpack&qid=1633369261&sr=8-148-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyWEEySFFXMjFCQ0o1JmVuY3J5cHRlZElkPUEwMzQ0NzU2MzhQNVFFWlBUNE5XTSZlbmNyeXB0ZWRBZElkPUEwMTc3OTU0MklQQzFCMUpTMVRRNCZ3aWRnZXROYW1lPXNwX2F0Zl9uZXh0JmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

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I use mine as a backpack all the time, especially for travel. It's carry on size and works as a weekender.