Big O.N.E. Cloth Diaper - Arctic

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 baby: 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 (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 71 reviews
Mary O.
Great absorbency and size but needs improvements

Appreciate the larger size and the absorbency is great, but I prefer a pocket style diaper because it much easier to clean with a diaper sprayer when you can remove the pads instead of the getting dirty as well and in the way. At the very least, add another snap to the other side of the pads so they dont flop all over the place. Also would appreciate a lower "hip" snap like on pocket style to better keep the diaper in place. Without it my little one plays with the diaper and it moves too much. I have to fix his diaper sometimes so there are no leaks.

Teala S.

My 3yo is 34lbs no leaks! Shes iep so potty tranings hard

Keaniani S.
My favorite diaper

I have a really big son, and he grew out of all the other cloth diaper brands pretty fast. They came out with this big O.N.E. right when I needed it, and I already loved the regular O.N.E so buying these was a no brainer. This has better absorbency than most of the other diapers and brands. I love this diaper. My son just made 4, he is also 70lbs and 4ft (he is a big kid) and some nights if he doesn't use the rest room before bed he ends up wetting the bed, so we put these on and no accidents or leaks.