GroVia Big O.N.E. Diaper Arctic
GroVia Big ONE Fern
GroVia Big O.N.E. Diaper Maverick
GroVia Big ONE Opal
GroVia Big O.N.E. Diaper Petal
GroVia Big O.N.E. Diaper Waverly

Big O.N.E. Cloth Diaper

4 reviews
Regular price$27.95
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GroVia Big O.N.E

Size:  Fits 35-70 pounds

Also available in the Buttah version.  

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 - 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 


• 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)

compare Grovia one and big one Comparison of Big O.N.E and O.N.E in color Petal.

 inside GroVia ONEinserts that come with GroVia Onegrovia outlast closure choice Choose to use the strong hook and loop or the snaps.  

 GroVia Big ONE ArcticGroVia Big ONE PetalGroVia Big ONE MaverickGroVia Big ONE WaverlyGroVia BIG One OpalGroVia BIG ONE Fern

Grovia big one

Customer Reviews
4.2 Based on 4 reviews
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  • Big ONES
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Morgan S.
Virginia Virginia


We stocked up on Big ONES for nighttime for our very large 10 month old. He is about 29 lbs and these fit great. No more leaking overnight!

Green Mountain Diapers Big O.N.E. Cloth Diaper Review
Melodi O.
California California

Not for us.

We bought these for my son who still wears diapers overnight. He wears 5T and is 45 lbs, and we couldn’t get a good fit with these diapers. No matter how we cinched them or stuffed them, we had lots of leaks. We wanted to have a large diaper that would grow with my son so he could use it for as long as he needs it, but at this point I just don’t think this diaper works for us. We got Thirsties Duo size 3 instead, and those fit much better on my son’s current size & shape.

Green Mountain Diapers Big O.N.E. Cloth Diaper ReviewGreen Mountain Diapers Big O.N.E. Cloth Diaper ReviewGreen Mountain Diapers Big O.N.E. Cloth Diaper Review
Sarah S.
Pennsylvania Pennsylvania


We bought these for our three year old who needs them at night. I wanted something that would fit for a while (we have reason to think she’ll need them for a couple years at least). She is exactly 35# which is the very bottom of the weight range. They do not leak!!!! I’ve cloth diapered three kids for years and I am thrilled with these. They are perfect. I WISH they had come out with these 6 years ago- I’d have bought two dozen off the mark. The only thing I was concerned about was the material against their skin. My daughter is allergic to polyester. However, there are different kinds and this kind is great- no rashes, no redness, no fussing about feeling wet.

Jillian Y.
Virginia Virginia


This was the solution to not having to spend so much on Goodnites for my 5 year old, he’s 67 pounds but these fit comfortably. Not a lot of room to spare but hopefully it will help get us through this stage. So far it’s held up for every accident. If you’re thinking about it go for it!

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