Summer Sleep Sacks, Nests & Wear

Beat the heat with our breathable summer essentials. Check out our lightweight baby onesie sleep sack, which replaces loose bedding. Made for active infants, our soft cotton styles provide the same mobility as a baby sleeping jumper. They ensure your little one stays cool and comfortable throughout the night.

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baby deedee sleepsie long sleeve heather gray teal
baby deedee sleepsie long sleeve - mint

Sleepsie Long Sleeve

From $21.99

sleep nest basic almond cream
Sleep Nest Basic

Sleep Nest Basic

From $21.95

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baby deedee sleepsie short sleeve - pink
baby deedee sleepsie short sleeve - pink

Sleepsie Short Sleeve

From $21.99

baby deedee teal elephants short sleeve 2-piece playsuit set
baby deedee teal elephants short sleeve 2-piece playsuit set

2-Piece Sleep and Playsuit

$17.99

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Summer Essentials: Baby Onesie Sleep Sacks & Jumpers

Keep your child cool and safe during the hottest months with our lightweight bedding. At Baby DeeDee, we changed our signature designs to make breathable sleepwear that stops overheating. Our summer collection provides a restful, sweat-free sleep for the whole family. It includes everything from the mobility-friendly baby sleeping jumper pajamas to the airy comfort of a baby onesie sleep sack for infants.

The Perfect Summer Baby Onesie Sleep Sack

Your baby needs a sleep environment that keeps the temperature just right. Our summer baby onesie sleep sack (like the Sleep Nest Basic or Lite) acts as a breathable wearable blanket. It gives your infant the security they need without the danger of overheating from heavy fabrics. These sacks work well in air-conditioned homes or on humid nights. They have our unique shoulder-snap design, which makes midnight diaper changes quick and easy while keeping your baby cool.

Active Sleep: The Baby Sleeping Jumper Option

For toddlers who are crawling, walking, or just being active, a restrictive bag might not be sufficient. Our summer collection meets the needs of these little explorers with lightweight choices that work like a baby sleeping jumper. Designs such as our "Sleepsie" or summer-weight walkers allow for complete movement. This clever design lets your child move safely around their crib or bedroom, offering the freedom they want without the trip hazard of a traditional sleeping bag.

Cool Comfort for Hot Weather

Whether it’s soft jersey cotton for a warm July night or a light layer for a breeze, we have the ideal fabric weight. We provide specific low-TOG values, usually 0.6 TOG, for our summer fabrics to keep your newborn at a safe body temperature all night. Use our breathable jersey cotton to wick away moisture, ensuring your baby stays dry and comfortable even when it gets hot.

Frequently Asked Questions

When should I switch from a sleep sack to a sleeping jumper?

It is important to consider switching to a baby sleeping jumper (or our summer Sleepsie) once your baby begins to pull up to a standing position or starts walking. A baby onesie sleep sack works well for a baby in a crib. However, a jumper has openings for the legs. This design allows toddlers to move around in cribs without tripping.

What should my baby wear underneath a summer sack?

What you put underneath depends on the room temperature. For a typical summer baby onesie sleep sack (usually 0.6 TOG), you will usually put a short-sleeve bodysuit or just a diaper underneath. This summer sack is meant to be your baby’s only blanket. In warm weather (70°F+), keep it very light underneath to avoid overheating.

Are baby sleeping jumpers safe for walking?

Yes. Our baby sleeping jumper styles are designed for toddlers who are starting to stand, crawl, and walk. This design features ankle cuffs that allow your child to move safely and freely in their crib or bedroom. It offers the same comfort as a sack but eliminates the trip hazard.

Why use a wearable blanket instead of a regular blanket?

Loose blankets in the crib can be dangerous because they increase the risk of suffocation. A baby onesie sleep sack removes these dangers by keeping the "blanket" securely on your baby and their face clear. In the summer, lightweight wearable blankets are especially important. They help keep the baby covered without using heavy, heat-trapping quilts.

How do I choose the right size?

Sizing depends on weight and height, not only age. A proper fit is crucial for safety. The neck hole should be tight enough to prevent your baby's head from slipping inside. Whether you are picking a summer baby onesie sleep sack or a jumper, always check our size chart to ensure a secure and comfortable fit.