SwaddleDesigns Cozy zzZipMe Sack non-weighted wearable blankets are perfect when your baby has graduated from the Transition Stage because their Moro (startle reflex) has faded. Most babies are ready for a sleeping sack around six months of age after their startle reflex has faded, and then baby can sleep well in a loose-fitting sleeveless sleep sack without awakenings caused by the startle reflex. (If baby still has a strong startle reflex and can roll over use SwaddleDesigns Transitional Swaddle Sack…it’s the No Cold Turkey Solution. The Transitional Swaddle Sack can also be used as a pajama layer under the zzZipMe Sack).

Our cozy zzZipMe Sacks are great in cooler seasons and environments. They have a TOG of 2.2 which is appropriate for ambient room temperatures between 65 - 70 degrees F. Layer with cotton pajamas underneath. 

Our innovative 2-way dual pull zipper was the first 2-way zipper used on baby sleepwear in the USA in 2007 when the SwaddleDesigns zzZipMe Sack was created. Our founder, a nurse, designed our zzZipMe Sack with the 2-way dual pull zipper so it would be easier to use than the commonly used clumsy, inverted zipper which connected at the neckline. The two-way zipper made it easier to place baby in the sack and zip close and easier to change baby’s diaper in the night without exposing baby’s chest, keeping baby more settled, snug and cozy during nighttime diaper changes.

The zzZipMe Sack name was chosen as a fun play on the zipper and sweet sleep.
 

The Chart below will help guide you to select the right fabric depending on the ambient temperature of the room in your environment. For example, if your winters are cold you would want to select one of our Cozy zzZipMe Sacks.

When your baby if fully past the swaddle phase (Stage 1 - 0-3 months) and has completely transitioned or weaned out of a snug swaddle (Stage 2 – 3-6 months), then baby is ready for Stage 3 in safe sleepwear. This milestone occurs most often between 6-18 months of age.

Baby is then ready to sleep well in a loose-fitting wearable blanket or sleeping sack.  Our zzZipMe sacks come in a variety of styles and designs so you can select one that right for you and your baby.

How to select the best wearable blanket for baby? Its best to use our chart above. Start by considering whether baby will be using the zzZipMe Sack in the Spring, Summer, Autumn or Winter, and consider the Sleeping Sack a wearable blanket. Just like you change the bedding on your bed seasonally, you will want to select the right fabric for baby’s zzZipMe Sack.

If you live in a warm climate all year long, you would most likely just need Cotton Muslin, and perhaps some Cotton Flannel or Cotton Knit for when the temps dip a bit.

However, if you live in a climate where it gets cold at night, consider one of the Cozy styles or Baby Velvet, and remember, sometimes the weather can surprise us, so it’s good to have a variety in baby’s layette for those unexpected weather changes.

The TOG number mentioned on the chart represents a level of thermal resistance. The higher the number the warmer the sack. The TOG numbers are used as a general guide when dressing your baby for sleep. Every baby is a bit different, so it’s best to touch and feel your baby’s tummy or neck to ensure they are not too hot and sweaty or too cold but comfortably warm, so they and you can both sleep well.