Nested Bean Zen Classic Sleep Sack

Last updated: January 10, 2024


This sleep sack comes weighted in the chest area to provide a little pressure to help baby sleep better. The material is breathable, which means you can use the sleep sack in every season. When you're ready to transition your baby out of swaddling, simply change the handy grow-with-me shoulder snaps.

We looked at the top Sleep Sacks and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Sleep Sack you should buy.

No products found.

Product Details

Key Takeaway: This sleep sack starts out fully swaddling your infant, and then changes to allow older babies to move their arms freely.

In our analysis of 44 expert reviews, the Nested Bean Zen Classic Sleep Sack placed 2nd when we looked at the top 17 products in the category. For the full ranking, see below.

From The Manufacturer

100% Cotton. Imported. Machine Washable. EASY TO USE: Two way zipper system makes midnight diaper changes a breeze. The adjustable shoulder snaps allows this wearable blanket to grow with your baby and make it the perfect swaddle transition product. LIGHTLY WEIGHTED: On the chest, to give the feeling of your reassuring palm. The weighted pad is filled with non-toxic poly beads (same as those used in children’s toys) and was created using physio-therapy standards to give just the right amount of pressure. Moms report longer sleep in 1-3 nights. THICKNESS: The Zen Sack Classic has a TOG rating of 0.5 which means it is breathable for Summer days but still warm and cozy enough for night time sleeping. MATERIAL: Made from 100% luxuriously soft cotton. Completely washer/dryer safe and BPA, toxin and phthalate free. Exceeds safety standards – 12 mandatory and 7 voluntary tests passed. SIZING: Comes in 3-6 months (7-18 lbs, 19-26 in), 6-12 months (16-24 lbs, 26-30 in) and 15-24 (26-36 lbs, 31-38 inches).

Our Expert Consultant

Kate Desmond 
Parenting Pro and Safe-Sleep Expert

Kate Desmond is a writer and infant safe-sleep expert. She has spent the last eight years working as the marketing director for Charlie’s Kids Foundation, a nonprofit that aims to educate families about SIDS and safe sleep. In that role, she travels around the country learning and educating caregivers and providers on the latest and greatest safe-sleep information to prevent infant death.

As mom to two elementary-aged daughters, she spends hours researching the best and safest products for her own kids. She is quick to get in the weeds with other mamas, and uses humor to cope with parenting woes from potty-training to teaching kids to read.

Expert Reviews


What reviewers liked

Lastly the thickness has a TOG rating of 0.5 meaning this blanket is breathable for summer days and is still cozy enough for night time sleep.
This unique sleep sack is made with lightweight rayon from bamboo, making it super breathable for those hot summer nights and daytime naps. We love that the design is practical and well-thought out, while still being adorable.
The material is super soft and cozy. I love how it zips from the bottom so you can easily change a diaper in the middle of the night. There are also two sets of snaps on the shoulders so your baby can use it longer. Such a great feature! I couldn’t wait to try it on my little guy!

What reviewers didn't like

The chest weight is ineffective once baby can turn over to its stomach.
The Zen sleep sack didn’t really make a difference in little Louie’s sleep. I was disappointed.
View our Sleep Sack buying guide for in-depth advice and recommendations.

From our partners