Big O.N.E. Cloth Diaper- Waverly

Our best-selling diaper, O.N.E, just got BIGGER and BETTER!  Introducing Big O.N.E., a diaper designed to meet the absorbency and size needs of larger kiddos. 

The Big O.N.E diaper is unique among cloth diaper all in ones (fits 35-70 pounds) because it comes with everything parents need to cloth diaper a larger toddler or older child. Enough absorbency to forget boosters and doublers (even overnight), two built-in closure options, and a heavy-duty construction that is built to last.

The Big O.N.E. features a unique Outlast closure system that gives you the ability to choose between Hook & Loop and Snap closures, and the ability to buy a replacement kit when your Hook & Loop wears out. Big O.N.E's absorbency comes from a hidden body layer PLUS our one-of-a-kind cotton, channeled soaker design that is trim yet absorbent. All with the same amazing quality you've come to know and love in GroVia products. 

No need to choose between Hook & Loop or Snap closures

With the Big O.N.E., you can have both! The removable Hook & Loop closure is perfect for those who love a “no-hassle” fit but want to transition to a snap closure later on. 

  • Built-in extra absorbency means the perfect nighttime solution
  • Larger fit for toddlers or older kids (fits 35-70 lbs.)
  • Modular Snap In Soaker System allows for customization
  • Easy closure replacement
  • Fairly and conscientiously made in China

    Washing Instructions

    This is an All In One diaper, you must wash the entire diaper when soiled.

    Before First Use

    Remove Hook & Loop strips*. The BIG O.N.E. must be washed and tumble-dried 3-5 times before first use.

    Regular Wash

    • Remove Hook and Loop strips*
    • Place soiled diaper into pail
    • Wash soiled diaper every two days
    • Wash on hot or warm with full amount of a good cleaning detergent using a heavy duty cycle
    • Add an extra rinse if needed
    • Tumble dry
    • Do not use fabric softeners or water repellent diaper creams
    • Do not dry clean or iron

    *For maximum longevity of your hook and loop, we recommend removing prior to washing and drying.

    Use & Materials


    • Hidden Inner Layer: 100% Polyester Microfiber
    • Outer: 100% Water Resistant Polyester TPU
    • Soaker: 100% Cotton topped with 100% Polyester Microfleece
    • Body Lining: 100% Polyester Microfleece
    • Outer: 100% Water Resistant Polyester TPU (Exclusive of Trim)


    • 1 All In One Outer Shell
    • 1 Large Soaker Pad
    • 1 Small Soaker Pad

    Customer Reviews

    Based on 62 reviews
    Morgan S.
    SO absorbent!

    We have a very large for his age 9 month old and I wasn’t sure this would fit him, but he’s out peeing the regular ones even when stuffed with toddler prefolds. However this is the BEST nighttime solution (and I’ve tried everything)! He is 28lbs, 31 inches and no leaks on the smallest settings with the small insert only. I will likely be ordering a few more so I can use these exclusively for nighttime.

    Love these!

    So I ordered these for a chunky 18 month old and they are actually a little bit big. I’ve adjusted them to fit as small as possible and they work great for overnight. I’m excited to order more when he is a little bit bigger!

    William H.
    Best reusable diaper for Toddler, Tween, Teen, Petite Adult & ALL Heavy Wetter's!

    Just how BIG is a BIG O.N.E?
    Well let me tell you a bit about myself first. I'm a very thin framed adult that suffers from incontinence, I'm always on the search for top notch products.
    I am 6' and 135lbs with a 29" waist, and yes, .....I wear Big O.N.E.'s!!! They are THAT BIG!!!
    That's not to say they won't fit your little one, they are very stretchy, and have many fastening positions available to get a great fit for a large range of body shapes and sizes, no matter the age.
    For me, Big O.N.E's are a very discreet low rise option that sits just below my pants line. When they say 'For Heavy Wetter's" they mean it! These are some extremely thirsty diapers. I can actually sleep for up to 6 hours and still wake up to a dry bed, and still feel dry too...simply AMAZING!
    I do wish they would come out with a "Bigger O.N.E" version, geared more towards the 70 -125lb range, for nights that I may sleep more than 6 hours. Perhaps 4" more rise, 3" more rear wings, 6" longer hour glass shaped channeled snap in pads?