bumGenius Big

{ one-size, pocket-style cloth diaper, fits 35-70 pounds }


This diaper is made with super soft stay-dry lining that wicks moisture away from skin. Gentle leg elastic and waterproof outer cover prevents leaks. You can stuff any insert inside the pocket to customize absorbency. Inserts sold separately.

Look for our unique butterfly closure system to ensure that you are getting genuine Cotton Babies™ brand cloth diapers

Oeko‐Tex Standard 100 certification indicates that bumGenius diapers have been stringently tested and are free from harmful or problematic substances.

  • Stay‐dry lining is super soft and wicks moisture away from skin
  • Waterproof outer cover and insert stopper prevents leaks
  • Accessible, replaceable, gentle elastic
  • Durable plastic snaps
  • 3x3 snap down design adjusts for customized sizing (approximately 35-70 pounds)
  • Trim, snug and comfortable stretchy tabs provide a custom fit
  • Pocket accommodates inserts for customized absorbency


  • Legs: 7.5"-22"
  • Waist: 14"-30"
  • Rise: 21"-24"

Cloth diapering has never been so easy!

bumGenius One‐Size Cloth Diapers feature our patented butterfly closure system to provide a comfortable, trim fit. This simple design makes cloth diapering as easy as using disposables.

Using bumGenius is as easy as 1, 2, 3

bumGenius cloth diapers are as easy to use as disposable diapers. Watch the video for a brief introduction, learn more about cloth diapering with our Cloth 101 education page, and download our washing instructions.
Internationally patented: www.cottonbabies.com/patents
Designed by a mom.
Covers are manufactured in the USA with Domestic and Imported materials.
bumGenius is brand created by Cotton Babies, Inc.


I've used BumGenius 4.0 on all 3 of my children, starting 6 years ago. I was so excited to see this new option for our youngest who is outgrowing his 4.0s and is special needs, but was more than disappointed to find they didn't come with inserts (especially at twice the price of the smaller size). I realize now it states they are sold separately in the description, but I didn't notice and wasn't looking for that information because every other BumGenius diaper I've ordered has them included. It might be worth highlighting that difference more prominiately for those of us who think we're just ordering more of the same product, sized up, that we've been using for years. I'll be re-evaluating my purchase, because at the price point, I was already debating if it was affordable for us to continue cloth diapering, especially when insurance will kick in with disposables at some point. I wanted to be environmentally responsible, but I still have a budget to consider.


Absolutely LOVE it. I bought it just to try out, but didn't have high expectations. My 3 year old 35 lb is special needs and isn't ready to potty train, but has outgrown most of his OS diapers. I've purchased several other brands in the 35-79 pound range and have been very disappointed in the way they fit. The Big fits spot on and how it should. I would compare the way it fits him to a OS diaper on a 10 pound baby. I've very excited about this diaper and looking forward to more color/print options soon.

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