Cool Blue Sleep Sack 0.5
All Sale items are Final. No exchanges or returns.
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Introducing the Cool Blue Sleep Sack 0.5. Made from breathable yet cozy Bamboo. Our sleep sack has a double zipper feature.
Sizes: 0-6m (28 1/3 Inches), 6-18m (34 5/8 Inches). No need to size up!
TOG rating – aka Thermal Overall Grade – measures coziness. The higher the TOG, the toastier the sack, while a lower rating = lighter material. Opt for a lighter TOG in hot months, and heavier in cold.
Frequently Asked Questions
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It means peace of mind. Every piece of our clothing is certified by STANDARD 100 by OEKO-TEX®, which is a fancy way of saying:
no harmful chemicals, no toxins, nothing icky- just safe, gentle fabric for your little one.
Oeko-Tex testing goes above and beyond national safety standards. From the thread to the dye, everything is screened for over 100 harmful substances. If it touches your baby’s skin, it has to pass the test.
You get softness they love, with the safety you can trust.
Certificate#: BJ050 249975
Test Report#: BJ050 249975.4
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Because softness matters- especially at 2 a.m. Our pajamas are made with viscose from bamboo, a fabric loved for its buttery feel, breathability, and natural stretch. It keeps your little one cool when it’s warm and cozy when it’s chilly, making it just right for sensitive skin (and sleepy snuggles).
Plus, it holds up wash after wash, because we know laundry day is always just around the corner.
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We gladly offer refunds or exchanges within 30 days of delivery on any unworn, unused items with tags still attached.
Just a heads-up: please hold onto the original plastic bag, you’ll need it to send your items back.
Need help with a return? Click HERE to start a return.
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Yes! IMJ fits true to size- no need to size up.
Compared to other viscose-from-bamboo brands, our pajamas are designed with a comfy, flexible fit that grows with your little one (thanks to the natural stretch). If you’re familiar with other bamboo brands, you’ll find our sizing refreshingly consistent- snug, not tight; roomy, not baggy.
When in doubt, check our size chart or reach out- we’re happy to help!
Exclusive Prints
Each season, we release a carefully curated selection of trendy, limited edition prints that can’t be found anywhere else. From playful florals to whimsical winter themes, available only for a short time each season.
Day-To-Night
Our bamboo jammers aren’t just for bedtime! Designed for day-to-night comfort, they’re perfect for lounging at home, nap time, and even play time!
Bamboo Fabric
Made from the softest bamboo fabric, our pajamas are ultra-gentle on delicate skin, offering unmatched comfort for your little ones and you. Experience the luxury of all-day coziness!