Why is the zipper upside down? December 18, 2024 20:18 Updated The zipper is inverted to allow you to unzip the SleepSack wearable blanket from the bottom for easy diaper changes Related articles Why is the zipper upside down? What size should I purchase in the Magic Merlin Sleepsuit? Why is the SleepSack Wearable Blanket sleeveless? I only received part of my order. When will I receive the rest of it? Can I start using a larger-sized SleepSack Swaddle on my newborn and then he/she can just grow into it?