AIRNEX Biodegradable Natural Walnut Kitchen Sponge

Important note on kitchen sponges

With sponges — especially the ones I use to clean dishes — I try to keep things practical. Most sponges on the market use some type of binder or structural material, so avoiding every polymer entirely isn’t always realistic. Instead of chasing “plastic-free” claims, I focus on reducing plastic exposure where it actually matters.

I try to avoid sponges made primarily from petroleum-based synthetic foams like polyurethane or polyester, and I steer away from hard plastic scrub layers that rely on rigid plastic fibers. I’m also mindful of antimicrobial treatments or coatings, as this tool constantly touches food surfaces. What I look for instead are sponges whose primary cleaning materials are plant-based, and whose abrasive element, when possible, comes from a natural source.

What I look for (and what I try to limit)

In this category, I prioritize plant-based materials like cellulose and natural abrasives (like walnut shell). I still care about function and durability, so the goal isn’t perfection — it’s choosing better materials and avoiding the biggest offenders that shed and wear down quickly.

Product description

The AIRNEX Natural Walnut Kitchen Sponge is a dual-sided sponge made primarily from plant-based cellulose, featuring a walnut-shell scrub side. One side handles everyday wiping and absorption, while the walnut shell surface adds scrubbing power for stuck-on messes without relying on harsh plastic abrasives.

This is a practical option if you’re trying to move away from fully synthetic sponges while still needing something that works for daily dishwashing and kitchen cleanup.

What I like

I like that the main cleaning materials are plant-based.

The walnut shell scrub side provides extra cleaning power without the hard-plastic feel.

It’s versatile enough for dishes, sinks, and counters, which helps simplify what I keep in the kitchen.

Things to keep in mind

The scrub side can feel a bit gritty, so I use lighter pressure on delicate surfaces.

Like any sponge, it should be replaced regularly for hygiene.