ABU Simple Ultra is ABUniverse’s answer for wearers who want capacity without busy prints. ABUniverse is famous for bold prints, but not everyone wants a design. The Simple line is ABU’s answer.
Simple Ultra
Simple Ultra is a 4-tape diaper in ABU’s high-capacity range, without the busy patterns of PeekABU or LittlePawz. It’s a good pick if you want ABU’s thickness and tape system with a cleaner look.

Simple Daytime
Simple Daytime is ABU’s newest release, designed for lighter, more discreet daytime wear. Thinner diapers are easier to wear under ordinary clothes and cost less per change.
A day-and-night pairing
Using Simple Daytime by day and Simple Ultra by night keeps fit consistent within one brand. ABU’s PowerUps boosters can extend either one.
How to judge it for yourself: Manufacturer capacity figures are a starting point, not a promise, and different brands measure them differently. The best test is a few nights or days of real use. Fasten the tapes snugly with the lower pair angled upward, check that the leg guards stand out, and note how long it lasts before you feel dampness. If it leaks, try the next size or add a booster before writing it off. Keep notes on fit, comfort, noise and skin condition so you can compare it fairly with other products you try.
Smart shopping checklist: Confirm your size with a sample first, then compare the cost per diaper across packs, cases and subscriptions. Check whether the retailer ships in plain packaging and how the charge will appear on your statement. Look for HSA or FSA eligibility if you have an account, and read the return policy before ordering, since opened hygiene products generally can’t be returned. Signing up for brand newsletters is also an easy way to hear about sales first.
More on ABU Simple Ultra
Keep reading with our related guide: Welcome to Diaperology: What This Site Is About.