4.0 OneSize Snap

By bumGenius

4.0 OneSize Snap

By bumGenius

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Availability: In Stock, Available to Ship Now

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We recommend you wash this item in hot water (140F/60C) once before use!

Best selling, top-rated, and recognized for its quality and performance, the BumGenius 4.0 is a one-size, pocket-style diaper that will keep your baby dry and comfortable. Including a small, lightweight insert for newborns and a larger one-size insert for your growing baby, this Cloth Diaper is sure to be there when you need it. Our favourite part about this Cloth Diaper is that when your baby outgrows the newborn insert, it works as an overnight booster or as extra absorbency for heavy wetters.

Additional Information

Additional Information

  • One size
  • Stay dry
  • Customized absorbency
  • Simple, easy to use design
  • Convenient snap closure
  • Adjust to fit babies 8-35+ lbs
  • Includes one small and large insert
  • Reduces clutter
  • Soft, waterproof outer fabric
  • Soft sueded inner fabric
  • Super stretchy, gentle leg and back elastic


  • Nappy Outter: 100% Polyester
  • Nappy Inner: 100% Polyester
  • Cover Tabs: 95% Polyester, 5% Spandex
  • Insert: 80% Polyester, 20% Nylon

Washing Instructions:

  • Pre-wash in cold
  • Wash in hot water (140F/60C)
  • No laundry additives
  • Line dry cover, tumble dry insert
  • No fabric softeners
  • Use 60 mL of bleach in hot water once per month
Not For Sale No
Reservations Enabled Yes
Additional Content No
Brand bumGenius
Number of Wheels No
Wheel Type N/A

Customer Reviews 8 Review(s)

1-8 of 30

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one of my favourite cloth diapers
The BG 4.0 is one of my favourite diaper in our collection. I have never had a blow out with these and they are very good for night time as they are very absorbent. For night time I like to add a doubler because my son is a very heavy wetter, and there is plenty of room in the pocket to stuff other inserts in. The snaps and elastics last really well too. I would highly recommend this diaper.
Review by Kathryn / (Posted on 2015-10-20)
Amazing diapers!
Can you give more than 5 stars? These are amazing! The fit is so snug, I have never had a blowout, and they are incredibly absorbent. They are simple to wash and I find the snaps hold up the best.
Review by Lindsay / (Posted on 2015-10-19)
Best cloth diaper!
I initially started with apple cheeks for my son. We started having a major leaking issue and switched to bumgenius. We would never go back! I recommend this diaper to anyone. We use bamboo apple cheeks inserts in the bumgenius diapers and no leaking!
Review by Carolyn / (Posted on 2015-10-19)
Super absorbent!
I try to reserve these diapers for nighttime because they are SUPER absorbent! I had plans to purchase extra inserts and doublers and try to find a combination that works for my heavy wetting daughter, and I didn't need it. These diapers EASILY last the night, best bang for your buck!
Review by Samantha / (Posted on 2015-09-24)
quality cloth diaper
This brand is my favouriteto use as they fit nicely and wash very well. I pair them with the disposable liners and it makes for the best cloth experience.
Review by Paula / (Posted on 2014-11-13)
Glad I went with these!
After doing some research I settled on these cloth diapers- very happy I did. Easy to stuff the pockets and easy to use. While I like the snaps, I prefer the Velcro closure - easier to get the exact fit I want.
Review by Carolyn / (Posted on 2014-10-26)
Not the best fit on my petite baby
The BG 4.0 is a really nice and good quality diaper, I just found it a little big for our petite girl. I did lots of adjusting, but the front rise just seemed to high on her.
Review by Wendy / (Posted on 2014-10-24)
Myself and fiancé are new to cloth diapering. We chose these diapers based of reviews. I must say that it's been 5 months and I don't regret it.
I prefer the snaps over the velcro, the velcro is already starting to not work as good.
Review by Ashley / (Posted on 2014-10-23)

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