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Choosing the Most Suitable Size: ZIGJOY Shark-Fin sleep sacks are available in 2 sizes, M fits for 3-6 months, up to 27in height/18lbs weight and L fits for 6-12 months, up to 31in height/30lbs weight. Designed with your baby’s comfort and growth in mind, both sizes promise a secure and cozy embrace for every stage
0.5 Tog, Ultra-Soft, High Stretchy: Transitional Swaddle is 95% rayon made from bamboo, 5% spandex, lightweight and super soft to the touch. Safe and Breathable fabric can help regulate baby’s body temperature, let them feel very comfortable. It has strong resilience and wear-resistance, durable to use and will not be deformed after washing frequently. Tog 0.5, for room 73-81°F/23-27°C, available for most seasons. Super easy care: machine washable, saving time
Great Transitional Sleep Sack: Transition sleep sack with sleeves acts as a safe wearable blanket in instead of traditional swaddle, preventing baby from breaking out or getting covered/tangled in loose blankets. Highly elasticized full sleeves allow baby to soothe himself by sucking his fingers with no constriction, and prevent him from scratching himself in sleep. Perfect swaddles for newborn or infants who are starting to roll over
Promote Self-Soothing, Help Independent Sleeping: Baby swaddle sack with tightened waist can wrap and fit the baby well, bring gentle closed feeling of security and effectively soothe them, reducing times the baby wakes up, both parents and babies can sleep better. Upgraded high-quality SBS 2-Way zipper, smoother and not easy to damage, so you can rest assured that you can use it. Easy to put on and take off, change diaper quickly, without affecting baby’s sweet dream
Widened Hem For Baby’S Growth: Roomy hem promotes baby’s hip joints development, and legs can kick freely but cannot be kicked off. Baby can stretch fully in this swaddle transition without worrying about limiting their nature. Let the baby grow up happily accompanied by our cute sleep sack swaddle. PS: According to the size chart, we recommend to leave enough space to grow up in order to use it for longer time

Very light and soft material
I purchased this product for my infant daughter to transition from a swaddle. She would fight sleeping every night until I put her in this sleep sack, easy peasy bedtime now and the feel of the material is so soft. Also, if you have a drooly baby like I do, the material is SUPER fast drying. Will definitely buy again!!!!
Better than the name brand!
I have two zipadee zips and my baby loves them, unfortunately theyâre way too pricey so I tried switching him to normal sleep sacks without success. I found these as a cheaper alternative and theyâre super soft and very stretchy, which makes me think theyâre probably easier for them to roll! The zipper is a bit cheap but no problems so far!
The perfect summer sleepsack
The perfect summer transitional sleepsackLove this sleepsack! Soooo soft, so stretchy and is very lightweight. I love it for my wee babe for allowing arms out for sleep movement/rolling. The 2 way zipper is also handy. Highly recommend it
Very thin and stretchy
I was expecting something closer to the zipadee after so many said this was just a knock off version bit this sack has so much stretch to it that my girls Moro reflex isn’t slowed down at all. I would say it’s likely a 0.5 TOG with how thin it is I was expecting atleast a 1 TOG.
Sleeper
Itâs thinner, stretchy material. Good product.
The quality is outstanding!
When I unpackaged it I was very surprised at the softness of it. Nice and light and looks comfortable
Quality
Quality is not good
Lightweight
The fabric is quite thin but itâs perfect for what we needed, very comfortable and soft too, and it didnât bunch up at the top either.
Helped me transition my baby out of her swaddle.
We love this and have found our children sleep best in this!
We LOVE this sleepsack. Itâs safe and has plenty of rooms for my baby to extend her arms and rollover as needed. The color is pretty and represented accurately. I love the stripe detail around the neck. The material is good and has held up to multiple washes. It is soft and stretchy and thin for hot nights. My baby likes it and can sleep in it anywhere! It is reasonably priced compared to others.
I purchased this sack ânewâ for my 4 month old.. what arrived to me was balled up in a bag, unzipped, stained with spit up, and must have been used previously over a hundred times.. it is also missing both zippers. how did this leave Amazon warehouse? I am livid and disgusted and feel so violated. Also terrible quality. Never got to use this one personally but did another one and it almost killed my baby by choking and suffocation.
My baby wore this only 2 nights and the neck is already stretched out. It was already a large neck hole to begin with. I just don’t think the material is good.