• Safety First, Always: Sleep easy knowing our sleep sacks are designed with your baby’s safety in mind. All of our products are rigorously tested by a leading JPMA Certified Lab, and Certified Pediatric Sleep Consultants Approved + Used.

• Midnight Change Magic: Our revolutionary WONDERZiP® system means baby stays cozy and covered during diaper changes with our genius 4-way zipper—no more fully unwrapping sleepy babies or struggling with complicated closures.

• Cloud-Soft Comfort: Ultra-soft bamboo viscose creates a gentle microclimate against baby's sensitive skin, naturally regulating temperature within the sleep sack to prevent the sweaty discomfort that often disrupts precious sleep.

• Perfect Temperature Control: With multiple TOG options designed for different room temperatures, you'll always find the perfect warmth level for any season—ensuring baby sleeps comfortably in their sleep sack all night long.

• Classic Sleep Sacks (3-36m) that replace loose blankets to keep baby safer with wearable, wiggle-friendly warmth. Loose blankets are not recommended by AAP and CPSC
• Swaddle Sleep Sacks (0-3m) that recreate that secure womb-feeling to calm startle reflexes and help babies sleep
• Long Sleeve Swaddle Sleep Sacks (0-3m) that let baby snooze with arms in any position—up, down, sideways, and more—while staying covered and secure
• Transitional Swaddle Sleep Sacks (3-6m) for little ones entering the rolling phase
• Footie Sleep Sacks (3-36m) that keep active little toes warm while allowing mobility
• Long Sleeve Sleep Sacks (3-36m) for extra coziness when temperatures drop
• Sleeveless Sleep Sack (3-36m)options for warmer nights or naturally hot sleepers

Feeling lost? You’re not alone — this is one of our most asked questions! If you have a 3-month-old, you’ve got multiple sleep sack options in baby’s size. Ultimately, it comes down to your little one’s preferences and needs:

• Swaddle Sleep Sack (0-3m): A cozy, arms-in or arms-out swaddle that recreates the secure womb-like feeling and calms the startle reflex with an inside belly band.
• Long Sleeve Swaddle (0-3m): Made for babies who don’t want arms in, this swaddle design lets them snooze with arms in any position—up, down, sideways, and more—while staying snug and covered, plus an optional inside belly band for extra security. 
• Transitional Swaddle (3-6m): Perfect for little ones entering the rolling phase — a snug torso with ¾ sleeves that offers warmth while giving more freedom.
• Long Sleeve Sleep Sack (3-36m): A classic sleep sack design with sleeves, giving babies full range of motion with a wider and fuller fit once they’re past swaddling.

We break it all down in depth in this article so you can choose what’s best for your LO.

Choosing the right sleep sack helps your baby sleep safely and comfortably. Consider age, size, climate, and preferences to support their growing needs. The Ultimate Guide to Choosing a Sleep Bag Your Little One Will Love

Yes! With optional arm openings, our swaddle sleep sacks safely transition from arms-in to arms-out, making them perfect for babies learning to roll. They are designed according to AAP Safe Sleep guidelines, our swaddles are snug, breathable, and never require extra blankets in the crib.

TOG (Thermal Overall Grade) measures how warm a garment is. In baby sleepwear, TOG ratings—from 0.5 to 3.5—help parents choose the right level of warmth for safe, comfortable sleep.

Use the TOG guide below to figure out which weight is right for your baby’s sleeping conditions. Remember, these temperatures are for the nursery temperature your baby is sleeping in. Here at günamüna, we typically stock 0.5 TOG for summertime, 2.5 TOG for wintertime, and 1.0 TOG all year round.

0.5 TOG      74-78°F / 23-26°C

1.0 TOG      70-73°F / 21-23°C

2.5 TOG      58-70°F / 15-21°C

Refer to our size guide based on your baby’s age and height. A proper fit is essential for both comfort and safety—preventing excess fabric near the face.

No. gunamuna sleep sacks are never weighted and fully comply with safe sleep guidelines. Our design keeps baby cozy without the risks associated with added weight.

Our normal order processing days are Monday through Friday 9am-5pm. Orders will not be processed on major holidays or weekends as we’ve reserved that time for our families. Orders are processed 1-3 business days after they are placed, in the sequence they are received. Expedited orders are noted with the carrier once they are shipped. This timeline is an estimate only and not guaranteed. During a launch or special promotions, it will likely take additional time for your order to process before being shipped due to extremely high volume. Once it ships, you will receive an email with your tracking number. 

If you place an expedited order please be aware that while we do our best to ship ASAP, orders are processed in the order in which they were received during normal shipping hours. Once processed, expedited USPS, UPS and FedEx delivery commitments will apply. 

We're listening. We invite you to call us at (978) 363-0426 or email us at hello@gunamuna.com with any questions, concerns, or comments. günamüna products are all made with you and your baby in mind. Our mission is to make the easiest and most comfortable sleepwear. 

Interested in initiating a return or exchange? Learn about our return policy here.