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bumGenius 4.0 One Size Pocket Diaper - ON SALE!

bumGenius 4.0 One Size Pocket Diaper - ON SALE!
Armadillo - Snap Closure
bumGenius 4.0 is a true one size pocket diaper. It fits babies weighing from 6-8 lbs up to 35+ lbs (they really do without a lot of bulk in the smaller sizes!). Each diaper comes with a FREE newborn AND one size insert.
Retail Price:$17.95
Your Savings:$2.00(11%)
On Sale:$15.95
Availability:In Stock + FREE Shipping!

Choose Options

Closure Type & Color/Print
Quantity Pricing
  • 3 - 5
  • $15.70
  • 6 - 11
  • $15.45
  • 12+
  • $14.95
NOTICE: The manufacturer of bumGenius/Cotton Babies has revised their guidelines to prohibit the sale of all bumGenius/Cotton Babies products outside of the USA. If you need help finding a retailer in your country please let us know!

The bumGenius 4.0 One Size Pocket Diaper has been a favorite for a long time. The bumGenius 4.0 focuses on functionality and addresses 3 issues that customers have been concerned about:

  1. Larger sizing - now the 4.0 will fit babies up to 35 pounds even if your baby is "chunky".
  2. You will be able to easily replace the elastic - no sewing knowledge needed!
  3. The 4.0 gives you a choice of hook & loop or snap closures.

Now the bumGenius 4.0 is a true one size pocket diaper. It fits babies weighing from 6-8 lbs up to 35+ lbs (they really do without a lot of bulk in the smaller sizes!). The new generous sizing accommodates larger babies! With its stretchy tabs, this is one of the easiest, great fitting cloth diapers on the market and can save you TONS of money. Buy only one size instead of three! *Fit is approximate and may vary depending on size & shape of your baby.

bumGenius 4.0 OS Pocket Diaper

Each bumGenius comes with a FREE newborn AND one size Cotton Babies Microfiber Insert (absorbs 15 oz) and FREE SHIPPING. When your baby outgrows the newborn insert, you can use it as an overnight booster or for extra absorbency for heavy wetters. This is the first pocket diaper with stretchy tabs that is most like disposables. The stretchy tabs help you get a snug fit without being too tight on baby's thighs every time. The soft outer fabric helps keep the diaper trim on a newborn and a toddler. Clothes will fit easily over this cloth diaper!

bumGenius 4.0 One Size Pocket Diaper bumGenius 4.0 One Size Pocket Diaper
One Size Cotton Babies Microfiber Insert

The bumGenius 4.0 has new hook & loop that is made of 100% polyester (most are nylon). It is flexible, softer, and stickier after washing. This new hook & loop will last longer!

The super soft suedecloth inner layer wicks the wetness away from baby and into the absorbent insert making your baby feel dry. A special covered pocket design helps to keep the insert off baby's skin and away from clothing. The wide slot opening makes it easy to stuff and remove the insert and the slot cover protects baby from wetness. The great stretchy tabs help ensure a perfect fit easily. Plus, there are cross-over tabs to ensure a perfect fit even on the smallest babies. On a newborn just roll down the front of the diaper to avoid irritation of the umbilical cord area and for an extra-small rise.

The front of the diaper adjusts the rise with a 3x3 snap down design to grow with baby. The leg casings have super stretchy, gentle elastic and are rolled out to avoid red marks and keep poo in (plus back elastic too). The leg elastic is easily replaceable so you can use the diaper for a longer period of time (multiple babies!). The new super soft waterproof outer material keeps this diaper trim on the newborn setting as it is on the toddler setting.

bumGenius 4.0 One Size Pocket Diaper bumGenius 4.0 One Size Pocket Diaper

The bumGenius is so easy to use, it is just like a disposable except you wash it!

Manufacturer care instructions for the bumGenius:

  1. Do not soak cloth diapers
  2. Wash soiled diapers every other day
  3. For best results, remove solids from diapers before storing in pail. Fasten tabs to laundry tabs on inside of diaper
  4. Wash/rinse cold to remove waste
  5. Wash hot (120 F/60 C) to clean diapers. Complete a second rinse to remove detergent residue
  6. Line dry covers, tumble dry inserts on normal heat
  7. Once per month, optionally use up to 1/4 cup bleach in the hot water (step 5) to sanitize diapers and fight odors.
  8. Use additive-free detergent. No perfumes, dyes, whiteners, brighteners, softeners, enzymes or other fabric enhancers. (*Top loaders - use 1/2 manufacturer's recommended amount of detergent. Front loaders - use 1/4 manufacturer's recommended amount of detergnt. Read the detergent label and measure!)
  9. Use only detergent and water. Do not use laundry additives (including vinegar, baking soda, and fabric softeners)

15-Day Wash satisfaction guarantee! Try the diapers. Use them. Wash them. If you don't like them - for any reason, you're welcome to return them within that time frame for a full store credit. For more information about the 15-Day Wash click here.

The more you buy the more you save! 1-2 $17.95, 3-5 $17.70, 6-11 $17.50, 12+ $16.95

Each bumGenius 4.0 Pocket Diapers comes with 2 Free Inserts - a one-size insert (holds up to 15 oz!) and a newborn insert.


  • The stretchy tabs have been redesigned to last longer and be trimmer yet comfortable and snug. The NEW hook & loop is made out of 100% polyester (most are nylon) that is flexible, softer, and stickier after washing.
  • Larger sizing to accommodate chunky babies - but still fit small babies too!
  • Easy elastic access so it can be replaced to refesh your diaper
  • Choice of NEW Snap or Hook & Loop
  • The slot where the insert is placed is wider for easier stuffing and removal of insert
  • An insert stopper keeps clothes dry
  • The insert stopper can be folded down for an even shorter rise to make the bumGenius 4.0 fit even smaller babies - size x-small!
  • Each diaper comes with TWO inserts - a newborn size for less bulk on little babies along with the one size insert

Diaper made in USA of domestic and imported materials. Insert made in China.

U.S. Pat. 7,629,501; 8,777,915; 8,062,276; 8,518,007. Other U.S. and International patents pending.

Warranty: The Cotton Babies warranty covers snaps, lining, hook & loop closures, elastic and waterproofing for 1 year from date of purchase. The warranty is for the original purchaser and proof of purchase is required. Leaking, odor and normal wear and tear are not covered. Not following washing instructions correctly voids the warranty.

Free Shipping for ALL Pocket Diapers!


5 Stars
Look great, work great!
Love these diapers. My only complaint is that the inserts are much more prone to staining than others I've tried, so laundry can be more of a hassle if you want to keep them bright white. The diaper covers fit well and look new even after a bunch of washes--they aren't prone to stains or fading. Point of advice, don't skip the cold rinse when laundering these--it's an absolute must to rinse them on cold before washing. Overall, I'm very happy w/ these pocket diapers.
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Reviewed by: (Verified Buyer)  from Madison, WI. on 8/25/2015
5 Stars
Love these diapers
I have several of these in the stash. I wish they had more prints but this is a great diaper! One super big plus for the company - the laundry tabs actually work EVERY TIME (this is not the case with all my other diapers and I have to unstick the diapers from each other when I get them out of the washer - no so with these!). I only have the hook & loop style so I can't speak for the snaps. This is also a really good diaper when it comes to absorbency. The thin insert is a bit too thin because my son can really wet a diaper down, but it might work for some other babies. The thick inserts works great for us, and they are not too thick for daytime. I love the design at the top front inside the waist that prevents wicking of moisture onto the onsie. I really love these diapers. Things I don't really like: The opening at the back (for stuffing the insert) needs to be at the waist line (the overlap flap is just more crevices for the poop to get into and more handling and spraying of a dirty diaper, - yeah the opening should be move to the fabric edge without a flap). Also the fabric used on the inside of the diaper (that goes against babies skin) tends to be more 'sticky' (as in the poop sticks to it more than other diapers' fabric) but I can deal with it. This is a great diaper that I would recommend to anyone!
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Reviewed by: (Verified Buyer)  from East, Texas. on 8/14/2015
5 Stars
We love our 4.0s!! I use them on our almost 2 year old and sometimes on our 6 month old and love them!!
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Reviewed by:  from Ga . on 7/31/2015
4 Stars
Nice diaper, I like the stretchy tabs and the lining is nice. Some of the stitching came out after a wash, but it still is holding up after several washes.
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Reviewed by:  from Madison . on 7/31/2015
5 Stars
Love the Chico!
I love BG 4.0 and the new Chico print is great! I wish BG would add more prints to the collection. Good quality and nice fit... No leaks!
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Reviewed by:  from Ohio. on 7/31/2015

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