Review & Giveaway: Bum Genius 4.0 OS from Wee Little Changes (US)

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Wee Little ChangesMany of you may know that the majority of the pockets in our cloth diaper stash are Bum Genius one size 3.0s. They are definitely the most popular diaper across the family. They get the most use and they have worked well for us. Many of you may also know that Wee Little Changes is one of my favorite online cloth diaper shops. They offer amazing customer service and free shipping in the US! What more could I ask for in a cloth diaper shop?

I was thrilled when April from Wee Little Changes wanted to get involved with Cloth Leaves Nothing Behind because I love to share as much as I can about great online retailers. When she offered me the opportunity to review the Bum Genius 4.0 One Size, I was thrilled.

Ever since the BG 4.0 was released, I have been interested in how the 4.0 compares to the 3.0s that we love.

I had read other reviews that mentioned improved aplix and larger sizing so I was interested in seeing how it would work for us.

Bum Genius 4.0 One Size Cloth DiaperWe received the Bum Genius 4.0 One Size in Ribbit which happens to be one of my favorite BG colors. I love how vibrant it is and how well it works for either a boy or a girl. The major difference I noticed when I unwrapped the diaper was that the inserts seemed larger to me. The diaper itself appeared to be very similar to the 3.0 before I placed them next to each other to compare.

The Bum Genius 4.0 has a variety of features that I appreciate including:

  • replaceable elastic (though we haven’t had to test this feature yet)
  • 3 different sizing options designed to fit baby from 7 pounds through 35 pounds
  • stretchy tabs to provide a more comfortable fit
  • slot cover to keep the insert inside the diaper and keep your baby dry
  • wide slot to make it easier to stuff

Bum Genius laundry tabsOne feature I’m thrilled to see has remained are the laundry tabs. The Bum Genius laundry tabs have always worked well for us. The only challenge has been the actual tabs themselves. As we washed our 3.0s the tabs began to curl. So far the 4.0 has held up well through multiple washings so I hope that this is part of the improved hook and loop features. Still, the BG laundry tabs have been some of the most reliable in our diaper stash. It will be interesting to see how the tabs on the 40 hold up over the next few months.

Bum Genius Insert comparisonAfter I washed the new 4.0, I got out a 3.0 that is in good shape so I could compare the sizing. The initial feeling I had about the 4.0 inserts proved to be correct. When I placed a full-size insert from a 3.0 (left) next to the insert from the 4.0 (right) there was an obvious size difference. I found this very interesting and figured that it meant there was a definite sizing difference between the two diapers.

I did find it interesting that the sizing snaps on the two inserts were placed with the same spacing so the length appears to have been added to both ends of the insert. Still, the sizing difference has not had an impact on diaper laundry. You can stuff either diaper with either insert and they both work well.

BG 3.0 versus BG 4.0When I placed the two diaper covers next to each other, there was also a visible size difference. In my photos the Bum Genius 3.0 is shown in Twilight and the Bum Genius 4.0 is shown in Ribbit.

As you can see there is a definite difference in the length of the diaper covers when they are unsnapped to the largest size setting. This setting is design to fit babies from 23 – 35 pounds. With W weighing around 26 pounds, this is the size setting that we use with him.

There is also a difference in the width of the new diaper versus the old version. I was pleased to see this difference in sizing since we have a big guy on our hands. To be honest, I wasn’t too sure how big of a difference this would make in the fit and the absorbency but I liked seeing the extra room.

When comparing the two diapers secured with the aplix, the size difference was still very apparent. There doesn’t appear to be much difference between the fabric above the loop strip but their is definitely additional room beneath the loop strip. Both diapers are unsnapped to the largest setting in the photo and you can see how much bigger the Ribbit 4.0 is than the Twilight 3.0. The Bum Genius claims that the 4.0 provides more generous sizing and based on my comparison, I would have to agree.

Bum Genius 4.0Once I put the Bum Genius 4.0 on W, I was very pleased with the fit. The larger sizing didn’t effect the fit at the waist and thighs. The elastic is gentle yet fits securely against his skin. From time to time, depending on how he is laying while sleeping the elastic can leave a mark on his skin but it fades quickly. It’s never been much of an issue for us.

Bum Genius fit comparisonI am a fan of higher rise because W is so long. Many diapers that claim to have a lower rise are just two low and we get leaks immediately. So anything with a higher rise definitely catches my eye. In the photo to the left you can see the Bum Genius 4.0 (top) compared to the Bum Genius 3.0 (bottom). In that photo both are shown in the Ribbit color. This photo isn’t the greatest as the 3.0 is W when he was younger so the diaper is snapped down. But you can see that the general fit of both diapers is very well on my chunky monkey.

If you have a bigger child, I would highly recommend the Bum Genius line. We have enjoyed the One Size pockets and the sized AIOs we have in our stash. The Bum Genius 4.0 One Size definitely earns a place at the list of our favorite diapers. I enjoy the more generous sizing and the new aplix has held up well. Although I haven’t tried the BumGenius 4.0 One Size with snaps but I would love the opportunity to try that diaper as well. If you are not an aplix fan, I would still recommend the Bum Genius.

The only challenge we have fun into with our Bum Genius involves some stinkies in the microfiber inserts. This problem has been resolved with the use of distilled white vinegar and eventually a bleaching of the inserts according to the directions on the Bum Genius website.

Formula Mom Disclosure: I received a free product for review purposes. However, all opinions and experiences are 100% my own.

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About Mariah Moon

Mariah is a former teacher and mother of a rambunctious little boy living in The Woodlands, Texas. She recently welcomed a little girl into the family and is learning how to balance a toddler and an infant! She works every day to figure out how to balance all of her roles and figure out her formula for being mom! She can also be found at Mommy Mindset Media, Disney DIY and Noise Girls.


  1. I would love to try the Flip system from Wee Little Changes.

  2. I would love to try the babykicks!

    Happysoul12 at att dot net

  3. Thirsties Duo Diapers

  4. Tiny Tush Hemp fitted

  5. i’d love an amber teething necklace for my 7 mo old!

  6. I’d like to try some of the cloth wipes and sprays!

    katalexandra at gmail dot com

  7. Janelle Prentice says:

    I’d like to have this diaper sprayer:

  8. I’d love to try the Tiny Tush Elite 1.1

  9. Love the Flip diapers.
    Madeline recently posted..Alva Baby Cloth Diaper Giveaway

  10. I would love to try the CJ’s Stick O’Butter Diaper Cream!
    Hannah Gardner recently posted..Birth Plan and My To- Do List

  11. I would love to try a Thirsties Duo Diaper!

  12. I’d also love a BabyKicks Diaper!

  13. I’d love to try the bumGenius Elemental AIO diaper!

  14. i would like to try a fuzzbunz OS diaper

  15. I could use a new amber teething necklace, ours broke!

  16. Carrie Martinet says:

    I’d love to get some Rockin’ Green from Wee Little Changes.

  17. Tanaya Syx says:

    I would like to have an applecheeks swim diaper.

  18. heather stewart says:

    Diaper Sprayer

  19. Anna Cooper says:

    Love a thirsties duo fitted

  20. Jenny Moses says:

    Flannel wipes!

  21. I`d like to try Moby Wraps
    Lori Thomas recently posted..happy toy machine! design your own toys : My Gallery

  22. I would also love the Thirsties Diaper Cover in XS/Newborn

  23. i would also to try a diaper sprayer.
    Mehera recently posted..Two Hip Peas in a Pod

  24. Organic Bassinet Mattress

  25. I would also like to try the Tiny Tush Organic Wool Soaker. ngiraldi at gmail dot com

  26. Carrie Phelps says:

    I would love to have the Pink Pirate Booty swim diaper.

  27. I’ve been dying to try the amber teething necklaces! :)
    Jeniffer S recently posted..De-Stressing: When Disposables Are a Good Thing

  28. Love the Nursing Bracelet

  29. A diaper sprayer would be nice

  30. Amanda Alvarado says:

    I’d love to try a Tiny Tush Hemp Fitted!

  31. I’d love to try an amber teething necklace on my daughter.
    Sarah Jane recently posted..My Little Psalms {Read Allowed Thursday and Thrifty Thursday}

  32. I want to try a thirsties diaper
    Jessica W. recently posted..I love Shutterfly!

  33. I’d love to get an Amber Teething Necklace!

  34. Sabrina Radke says:

    I want to try the Babykicks organic hemp fitted diaper

  35. would love to try the fuzzi bunz hanging wetbag!
    hancoci_s at msn dot com

  36. I would try the tiny tush hemp

  37. jordan marie :)
    Jordan Marie recently posted..q&a [currentlocation]

  38. I am in love with the 4.0 bumGenius diapers!
    Jordan Marie recently posted..q&a [currentlocation]

  39. Another product at Wee Little Changes that I’d love to have is the GroVia AIO!

  40. Would love to get the fruit tote for my little guy!

  41. jennifer huff huey says:

    i would like a moby wrap

  42. I like the Diaper Sprayer

  43. Bonnye Sensenig says:

    I would love to have another Grovia AI2!

  44. I would like to win!

  45. i would love an amber teething necklace!

  46. sara myrick says:

    I would love to try one of the Tiny Tush wool soakers, thirsties duo wraps, or a diaper sprayer- I really can’t decide, they have so many wonderful products!

  47. Stephanie G says:

    I would love to have one of the tiny tush elite diapers!

  48. Jessica Sapalio says:

    I like the fuzzibunz 6 pack

  49. Kilee Driggers says:

    I would try the newborn rental out for the bumgenius diapers. i think thats an awesome idea!

  50. Material Girl Green says:

    I like the applecheeks swim diapers
    Material Girl Green recently posted..Wordless Wednesday

  51. Love the Knickernappies!

  52. I would love a Thirsties duo fab fitted diaper.

  53. I’d love to get some Rockin’ Green from Wee Little Changes. :)

  54. Fave item: Moby Wraps
    all natural katie recently posted..Dishwasher Leaving Cloudy Film on Dishes

  55. Samantha Allen says:

    I’d love to also try fuzzibunz hemp.

  56. Thirsties Duo Wrap w/Snaps

  57. Vicky Carlson says:

    Thirsties Duo Wrap w/Snaps

    I’m sorry my name didn’t go into the previous post.

  58. Jessica Sapalio says:

    I’d also like to try Fuzzibunz hemp diapers.

  59. Indian Cotton Prefolds
    jsbecker29 at gmail dot com

  60. Melynda Rainsbarger says:

    I wouldn’t mind owning a FuzziBunz® Hemp One-Size Diaper.

  61. Material Girl Green says:

    I would like to try a diaper sprayer.
    Material Girl Green recently posted..Wordless Wednesday

  62. Micah Pearson says:

    Moby Wraps

  63. Great giveaway!! Thanks!

  64. I would love bum genius 4.0 snap in zinnia!

  65. I’d love a Grovia AI2 “Planes” :)

  66. I would love to try a windy day swim diaper!

    mikaelar41 at gmail dot com

  67. swedenesefamily says:
  68. Diaper sprayer!

  69. Samantha Cuhel says:

    I love the bumGenius Elementals
    Samantha Cuhel recently posted..Guest Post: Staying Active As The Fall Approaches

  70. I would love to try an Applecheeks swim diaper!

  71. Elizabeth Flynn says:

    I reaaly want to try the flip system!

  72. Melanie Johnson says:

    I love the Fuzzibunz too!

  73. Sabrina Radke says:

    I would love to try the babykicks fitted!

  74. This is going to sound lame, but I really need some Snappis lol.

  75. Id love to try the amber teething necklace!

  76. Amanda Boerst says:

    I would love to try the diaper sprayer!

  77. I’d love to try the CJ’s Stick O’ Butter diaper cream. Thanks!

  78. Michelle Willis says:

    I would love to try the Natural Wipe Solution

  79. Jennifer Nakamuro says:

    Would love to win a bumGenius 4.0!!

  80. I would LOVE to try the grow via airplanes print. spottedjagiwar at yahoo dot com

  81. Vanessa Coker says:

    I’d love to have a FuzziBunz® Diaper Sprayer – Chrome.

  82. Madeline Jones says:

    I’d like to have one of their swaddle blankets
    Madeline Jones recently posted..Wordless Wednesday

  83. Amanda Maupin says:

    I really want to try the hemp fuzzibunz!
    Amanda Maupin recently posted..Getting back to normal

  84. Samantha Cuhel says:

    I would love to try Babykicks

  85. Jessica berry says:

    Id love to have the diaper sprayer and agoo leggings!

  86. Knickernappies OS

  87. I would love the sprayer!
    Ashley B recently posted..Back from vacation! | Dayton, Ohio Child Photographer

  88. I’d like to try the bumble training pants

  89. Dolly Acosta says:

    I really want to try these!

  90. Thirsties Duo Fab Fitteds, I want to get some fitteds for our new baby
    Karine Traverse recently, just in time!

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