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 15 reviews
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?

Great diaper, lots of maintenance

I am not happy with the absorption as it captures the smell a lot. After calling into the company I was told we need to use powdered detergent and more of it when washing. I was also told after I purchased and used that the only way to get the smell out is to use their bubbles and then bleach. These diapers take a lot of maintenance and too much time. Fits great and well made other than the above.

Danielle P.
Night time bed wetting

I purchased this for 6, 7 and 9 year old children with night time bedwetting incontinence. After spending so much time and money, only to end up buying disposable training pants, replacing mattress covers and ultimately mattresses, I am pleased to say I am done with that cycle. These diapers wash and wear amazing even with being washed daily! I have struggled to find anything to get the smell from my children's pajamas from their bedwetting issue. I would end up washing with detergent, adding boosters, changing avail. 1 wash, no lingering smell of urine.
Oh the best part, not changing sheets and washing bedding every day anymore! These diapers do not leak!
Finally, I can buy them a final NEW non urine smelling mattress and have peace and security in the amazing job the grovia diapers do for my family!