Here’s the scenario Sustainably Yours exists for: you’re done with clay dust coating every surface, you wince at strip-mined bentonite going to a landfill, and you’d like a litter that doesn’t announce itself with perfume. Corn and cassava — yes, cassava, the yuca root — turn out to clump remarkably well. Pet Five’s Sustainably Yours built a cult following on exactly that: a two-ingredient, plant-based litter that clumps like clay without the dust cloud.
The honest note most roundups skip: this is a premium-priced natural litter, and it behaves like one — excellent in the ways that matter (clumping, dust, odor), with premium-litter annoyances (roughly double the per-pound price of World’s Best, small granules that track, and clumps so hard they can be a chore to bag). The brand’s lineup is also genuinely small — three formulas in a handful of bag sizes — so this guide covers every real configuration instead of padding the list. What you get is the complete picture: which formula fits your cats, which bag size makes sense, and where the price stings.
Travelers take note: the 10 lb bags are the ideal size for a travel litter box, and the formula’s near-zero dust means no dust cloud when you’re pouring litter in a parked car or a hotel bathroom.
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Sustainably Yours Cat Litter at a Glance
| # | Product | Formula / Size | Best For | |
|---|---|---|---|---|
| 1 | Multi-Cat Plus (13 lb) | Small-grain, extra cassava · 13 lb | Best overall | Check Price |
| 2 | Multi-Cat (13 lb) | Mixed-grain standard · 13 lb | Best standard pick | Check Price |
| 3 | Large Grains (10 lb) | Large granules · 10 lb | Least tracking | No Amazon listing found |
| 4 | Multi-Cat Plus (26 lb) | Small-grain, extra cassava · 26 lb | Best bulk buy | No Amazon listing found |
| 5 | Multi-Cat Mixed-Grain (10 lb) | Mixed-grain standard · 10 lb | Best trial size | Check Price |
| 6 | Large Grains (13 lb) | Large granules · 13 lb | Large-grain value | No Amazon listing found |
All formulas are unscented, corn + cassava based, and made by Pet Five. Amazon prices and ratings could not be verified automatically — treat figures as approximate. Products without an Amazon link are sold through Chewy and independent pet retailers.
1. Sustainably Yours Multi-Cat Plus (13 lb) — Best Overall
Multi-Cat Plus is the flagship: the finest grain size in the lineup with extra cassava blended in, which is what gives it the brand’s best odor control and fastest clumping. It’s the formula Jackson Galaxy’s crew reportedly uses, and it’s the one multi-cat households consistently land on after trying the standard version. The small, uniform granules feel soft on paws — a genuine plus for cats with sensitive feet — and clumps form fast and firm enough to scoop cleanly without crumbling.
The honest part: this is the priciest configuration in the lineup at roughly $2.20 per pound — about double World’s Best Cat Litter per pound. The fine granules also track the most of any formula here; the small pieces hitch rides on paws, and you’ll want a litter mat. And the clumps can set extremely hard — some owners describe them as almost sculptural, with sharp edges that make bagging awkward.
Specs: 13 lb bag · small-grain corn + cassava (extra cassava) · unscented · flushable after 15-min soak (not in California).
Pros: best odor control and clumping in the lineup; soft on sensitive paws; virtually dust-free pour; firm, clean-scooping clumps.
Cons: premium price — roughly $2.20/lb, double World’s Best; fine granules track; clumps can set very hard with sharp edges.
Verdict: The one to buy first — the formula the brand’s reputation is built on. Check the price on Amazon.
2. Sustainably Yours Multi-Cat (13 lb) — Best Standard Pick
The original formula: a mix of large and small granules that balances clumping speed against tracking. Independent testers rated it 4/5 overall, praising the dust-free pour and surprisingly good unscented odor control, and it’s slightly cheaper per pound than the Plus (around $2.10/lb). For single-cat homes or cats that don’t need maximum odor firepower, the standard Multi-Cat is the sensible default — the mixed grain size means it tracks a bit less than the Plus while still clumping well.
Where it falls short of the Plus: in multi-cat homes, some owners find the standard formula’s odor control fades faster between full changes, and the mixed granules clump a touch slower than the fine-grain Plus. If you have three or more cats sharing boxes, the Plus is worth the small premium. For one or two cats, save the money.
Specs: 13 lb bag · mixed-grain corn + cassava · unscented · flushable after 15-min soak (not in California).
Pros: best balance of clumping and tracking; slightly cheaper than Plus; excellent dust control; good unscented odor control for 1–2 cats.
Cons: odor control can fade faster in busy multi-cat boxes; mixed grains clump slightly slower than the Plus formula; still premium-priced vs. clay.
Verdict: The sensible default for one or two cats — Plus-level quality without the Plus price. Check the price on Amazon.
3. Sustainably Yours Large Grains (10 lb) — Least Tracking
Large Grains is the answer to the lineup’s main complaint: tracking. The bigger granules don’t hitchhike on paws the way the small-grain formulas do, and owners consistently report the least mess around the box with this formula. It keeps the same two ingredients and the same light color — which several owners credit with helping them spot blood in urine early, since color changes show clearly against the pale litter.
The trade-off is clumping speed: the larger granules clump a bit slower and less aggressively than the finer formulas, so it suits cats that aren’t power diggers and homes where a few extra seconds of set time don’t matter. It’s also the formula most often reported out of stock at retailers — Chewy has listed it as out of stock at times, so grab it when you see it. No verifiable Amazon listing was found; Chewy and independent pet stores are the reliable sources.
Specs: 10 lb bag · large-granule corn + cassava · unscented · the lineup’s lowest-tracking formula.
Pros: least tracking of the three formulas; same natural two-ingredient formula; light color helps spot urinary changes; very low dust.
Cons: clumps slower and less aggressively than finer formulas; frequently out of stock at retailers; no verified Amazon listing — buy at Chewy or local pet stores.
Verdict: The low-tracking pick — worth hunting down if litter trails drive you mad. No Amazon listing found; available at Chewy and independent retailers.
4. Sustainably Yours Multi-Cat Plus (26 lb) — Best Bulk Buy
The 26-pound bag is the same Multi-Cat Plus formula — fine grain, extra cassava, best odor control — in the largest size the brand sells. For multi-cat homes going through litter steadily, the big bag cuts the per-pound cost meaningfully and halves the reorder frequency. It’s the economical way to feed the flagship formula to three or four cats.
Two practical notes: 26 pounds of dense corn-cassava granules is heavy and awkward — decant into a smaller container for daily use rather than hauling the bag to the box. And no verifiable Amazon listing was found for this size, so it’s a Chewy and pet-store purchase. Given the premium price, the bulk bag is also the biggest commitment — make sure your cats like the formula (try the 13 lb first) before investing.
Specs: 26 lb bag · small-grain corn + cassava (extra cassava) · unscented · same formula as the 13 lb Plus.
Pros: lowest per-pound price for the flagship formula; fewer reorders for multi-cat homes; same excellent clumping and odor control.
Cons: heavy and awkward to handle — decant for daily use; no verified Amazon listing; big upfront cost — confirm cats like it first.
Verdict: The multi-cat economical choice — but trial the 13 lb bag before committing. No Amazon listing found; available at Chewy and independent retailers.
5. Sustainably Yours Multi-Cat Mixed-Grain (10 lb) — Best Trial Size
The 10-pound mixed-grain bag is the standard Multi-Cat formula in the smallest size — and the smartest way to try the brand. At this price point you can run a proper two-week trial: transition one box, watch whether your cats accept the texture, and see if the odor control holds up in your home, all without committing to a premium-priced big bag. It’s also the ideal travel size — 10 lbs fills a travel litter box for a long trip with room to spare, and the near-zero dust makes car-side pouring civilized.
Being the standard formula, it shares the standard formula’s limits: in busy multi-cat homes the odor control won’t match the Plus, and the mixed grains track more than the Large Grains. But as a trial or travel bag, it’s exactly right.
Specs: 10 lb bag · mixed-grain corn + cassava · unscented · smallest size in the lineup.
Pros: cheapest way to trial the brand; ideal travel-box size; very low dust for on-the-road pouring; good clumping for the size.
Cons: standard formula — not the Plus’s odor control; mixed grains track more than Large Grains; small bag means frequent rebuys as a daily driver.
Verdict: Start here — the low-commitment trial, and the perfect travel bag. Check the price on Amazon.
6. Sustainably Yours Large Grains (13 lb) — Large-Grain Value
The 13-pound Large Grains bag pairs the low-tracking large granules with a better per-pound price than the 10 lb bag — the value play for households that settled on this formula. Everything about the Large Grains formula applies: least tracking in the lineup, slightly slower clumping, the same pale color that’s useful for spotting urinary changes, and the same two-ingredient, unscented, flushable profile.
The caveat is availability: this size is listed by third-party aggregators but we could not verify a current Amazon listing, and the Large Grains formula in general sells out at retailers. If you find it at Chewy or a local pet store, it’s the best-value way to buy the low-tracking formula — but don’t plan your litter routine around a size that’s intermittently stocked.
Specs: 13 lb bag · large-granule corn + cassava · unscented · best per-pound price for the Large Grains formula.
Pros: lowest tracking formula at a better per-pound price; same natural ingredients; light color aids health monitoring.
Cons: slower clumping than fine-grain formulas; intermittent retail availability; no verified Amazon listing.
Verdict: The large-grain value size — great if you can find it in stock. No Amazon listing found; available at Chewy and independent retailers.
How to Choose a Sustainably Yours Litter
Pick the formula by your household. Multi-Cat Plus (fine grain, extra cassava) for multi-cat homes and maximum odor control; standard Multi-Cat (mixed grain) for one or two cats and the best balance; Large Grains for tracking-sensitive homes. The price steps are small between them — match the formula to the problem, not the pennies.
Do the per-pound math honestly. At roughly $2.10–2.20 per pound, Sustainably Yours costs about double World’s Best Cat Litter per pound. The value case is waste reduction: firm clumps mean you throw away less clean litter per scoop, and the box needs full changes less often. If you dump half the box weekly with crumbly litter, the premium pays for itself; if you’re already efficient, it’s a luxury.
Size the bag to the commitment. 10 lb to trial the brand or fill a travel box; 13 lb as the standard daily driver; 26 lb only after your cats have voted yes. Premium litter you have to give away because the cat rejected it is the most expensive litter of all.
Transition slowly from clay. Corn-cassava litter feels and smells different from clay. Mix it into the old litter over 7–10 days, starting mostly old, and keep one box on the old litter until the cat uses the new one reliably. Most cats accept it readily, but a cold switch risks box avoidance.
Manage tracking with a mat, not just the formula. Even the Large Grains formula tracks some — no litter is truly track-free. A double-layer honeycomb mat outside the box catches most of what paws carry, and the pale granules are at least easy to see and vacuum.
Know the flushability rules. The brand says clumps can be flushed after soaking 15 minutes — but it’s illegal to flush any cat litter in California, and toxoplasmosis in cat waste can harm marine mammals, so many vets and environmental groups advise against flushing regardless. Bag and trash is the safe default; treat flushability as a backup, not a feature.
Bottom line: Multi-Cat Plus in the 13 lb bag is the best Sustainably Yours buy — the finest grain, the extra cassava, the odor control the brand is known for. Single- or two-cat homes can save a little with the standard Multi-Cat 13 lb, and tracking-haters should hunt down the Large Grains formula. Start with the 10 lb mixed-grain bag to trial it — or to fill the travel box. Just go in clear-eyed: it’s superb litter at roughly double the price of World’s Best, and the clumps set hard enough to earn their reputation.
Frequently Asked Questions
What is Sustainably Yours cat litter made of?
Two ingredients: corn and cassava (the starchy yuca root). Pet Five blends them into granules — the starches are what make it clump when wet. There are no added fragrances, no clay, and no silica. The Multi-Cat Plus formula uses extra cassava and a finer grain for stronger odor control and faster clumping.
Is Sustainably Yours cat litter flushable?
The brand says yes — soak clumps for 15 minutes first so they break down. But there are real caveats: it’s illegal to flush cat litter of any kind in California, and cat waste can carry toxoplasmosis, which harms marine mammals when it reaches waterways. Most vets advise bagging and trashing litter regardless. Treat flushability as an emergency option, not a routine method.
Sustainably Yours vs. World’s Best Cat Litter — which is better?
They’re the two big names in plant-based litter, and the trade-off is clear: Sustainably Yours clumps firmer and produces less dust, but costs roughly double per pound (around $2.10–2.20/lb vs. ~$1.30/lb for World’s Best). World’s Best is cheaper and widely available but corn-only, with softer clumps some owners find crumbly. If clump quality matters most, Sustainably Yours wins; if budget matters most, World’s Best does.
Does Sustainably Yours track?
The fine-grain formulas (Multi-Cat Plus especially) track moderately — small granules hitch rides on paws, and owners consistently mention it. Large Grains tracks the least. A litter mat outside the box handles most of it, and the pale granules are easy to spot and vacuum. If tracking is your top complaint, Large Grains is the formula to get.
What’s the difference between Multi-Cat and Multi-Cat Plus?
Plus uses a finer grain size and extra cassava, which gives it faster clumping and stronger odor control — it’s built for multi-cat homes. Standard Multi-Cat uses a mix of large and small granules, balancing clumping against tracking, and costs slightly less per pound. For one or two cats the standard is plenty; for three or more, the Plus earns its premium.
Is it safe for kittens?
The ingredients are natural and unscented, which is good, but the standard veterinary guidance applies to all clumping litters: kittens under about 8 weeks may ingest litter and risk intestinal blockage, so use a non-clumping litter until they’re older. For kittens past that stage, the fine-grain Plus is soft on paws — just supervise the transition like any litter change.
