Cornstarch and PBAT (a compostable polymer), with a little plant glycerine. The cornstarch is a by-product of the food industry.

They are certified compostable to the European standard EN 13432. They're a bioplastic, so we never call them "plastic free", but they are made to compost, not to last for centuries.

Degradable bags are ordinary plastic. They take hundreds of years to break up, and they break into microplastics.

Biodegradable bags are usually plastic with an additive to speed up breakdown. There's no set timeframe, and the science behind them isn't widely supported.

Compostable bags are certified to break down into water, carbon dioxide and biomass in compost conditions. Ours are compostable, not just biodegradable. Read the full explainer.

No. Oxo-biodegradable bags break into tiny plastic fragments as they degrade. Our bags are certified compostable to EN 13432 instead.

Around 3 to 6 months in compost conditions (a home compost heap or an industrial composting site). Anywhere else, such as landfill, it takes longer, because breakdown needs air, warmth and microbes.

Our bags are 20 microns thick, compared with around 15 microns for typical poo bags. We've tested them holding a 3.5kg house brick.

• With handles, on a roll: 12 × 7" (small to medium dogs)
• Without handles: 13 × 9" (our most popular, medium to large dogs)
• Extra large with handles: 14 × 7", our biggest bag, for the biggest dogs

Yes, 12 months. Because they're made to break down, keep them somewhere cool and dry and use them within a year. It's also why we don't sell huge bulk bundles. An average dog owner uses about 2 bags a day, so 120 bags lasts roughly 2 months.

No. Please don't flush them. They will block drains and pipes.

The best option is a home compost heap or a dog poo wormery, kept separate from your food compost. Don't use the compost on anything you plan to eat, as dog poo can carry pathogens.

If that isn't possible, a dog poo bin or your general waste bin is fine. Most of that waste is burned, and when burned our bags give a much safer burn than plastic bags. Landfill slows breakdown down, so composting is always best.

Yes. Composting is better if you can, but the regular bin is fine.

Free UK delivery on orders of £24 or more. Below that, Royal Mail Standard is £3.99.

Orders placed before 3pm on a working day are dispatched the same day. Royal Mail usually delivers in 2–4 working days. Please allow a little extra time at busy periods. Shipping information.

Not yet. We currently ship to UK addresses only.

Yes. We offer free returns and exchanges within 30 days of you receiving your order. See how returns work.

Choose how often you want your bags, and we send them automatically with 10% off every order. You can change, skip or cancel at any time.

Yes. Log in to My Account, open your subscription and pause it or skip the next order.

In My Account you can change products, add or remove items and change your delivery frequency at any time. How to add products to your subscription.

No problem. Make your deliveries less frequent, skip the next one or pause your subscription. If you're running out, make deliveries more frequent. Your plan is fully flexible.

Yes. Add products such as our compostable pet wipes to the same plan and they'll arrive in the same delivery. Removing a product doesn't affect the rest of your subscription.