Best newborn onesies: snap vs zipper

You will change a newborn 8 to 12 times a day. Multiply by the seconds spent fumbling with closures and the choice between snap, zipper, and magnetic adds up. Here is the honest breakdown.

Snap onesies

The original. 5 to 7 snaps from collar to crotch. Cheap (often $5 to $10 each). Available everywhere. The downside: middle-of-the-night fumbling. Snaps are easy to mismatch — you fasten one off by one and end up with an extra snap at the bottom.

Pros: Cheapest. Easy to find in any store. Sturdy (no closure mechanism to fail). Best for daytime when you have full attention.

Cons: Slow to snap correctly. Mistakes mean re-doing. Frustrating with cold fingers, in the dark, or with a wiggling baby. Snaps can snap baby's skin if you pinch wrong.

Best for: Daytime onesies, daytime onesies that go under outfits, budget shoppers, registries that need volume.

Zipper onesies

Single pull from top to bottom (or top-down, two-way). The pull can have a chin guard to protect from pinching. Faster than snaps. Most have a single closure point at the neck for security.

Pros: 3 to 5 times faster than snaps. Single pull, done. Less likely to mismatch. Good for night changes.

Cons: Slightly pricier than snaps ($12 to $25 per onesie). Zipper can pinch baby skin if you are not careful. Long-term wear can cause zipper teeth to wear out.

Best for: Night onesies, pajamas, parents who hate snap-fumbling, families on tight schedules.

Magnetic onesies

The newest closure type. Magnetic snaps (Magnetic Me brand and a few competitors) self-align when you bring them close. No fumbling, no mismatched snaps. Perfect for sleepy hands.

Pros: Fastest closure of all three. Self-aligning — drop the panels close and they snap together. Best for night changes. Cute, modern designs.

Cons: Most expensive ($30 to $50 per onesie). Magnets can lose strength over time. Not as widely available. Some users report concerns about magnetic strength near pacemakers or medical devices (clear concerns for caregivers, not for babies themselves).

Best for: Newborn nights, sleep-deprived parents, baby shower splurges, families with twins or rapid-fire diaper changes.

The 5 onesies we tested

1. Burt's Bees Baby Organic Cotton Bodysuit, Snap (around $7 each, $25 for 5-pack)

The basic. 100% organic cotton. Soft after first wash. Holds up to repeated washing. Standard 5-snap front and 3-snap crotch. Available in 0-3 month sizes for newborns.

Best feature: Soft fabric, ethical sourcing, affordable.

2. Carter's Original Bodysuit, Snap (around $4 each, $15 for 5-pack)

The classic. Cotton blend. Cheapest credible option. Front snap or side snap. Widely available at Target, Walmart, Carter's directly.

Best feature: Cheapest. Decent quality for daytime everyday wear.

3. Kickee Pants Zip Footie (around $35 each)

The premium zipper. Bamboo-rayon blend, ultra-soft. Two-way zipper (unzips from the bottom for easy diaper changes without exposing the chest). Long-lasting.

Best feature: Two-way zipper. Bamboo fabric.

4. Magnetic Me Magnetic Front Bodysuit (around $30 each)

The flagship magnetic. 4 to 6 magnetic snaps along the front. Self-aligning. Soft modal-cotton blend. Cute designs.

Best feature: The magnetic closure changes night changes.

5. Hanna Andersson Zipper Pajamas (around $30 each)

For sleep specifically. Footed pajamas with a zipper front. Made in Sweden. Long-lasting, soft pima cotton. Sized generously.

Best feature: Durability. These last through 2 to 3 kids.

How many newborn onesies do you need

You will change a newborn 4 to 6 times a day in the first 3 months, between blowouts, spit-ups, and routine changes. The math:

• Newborn (0 to 1 month): 8 to 10 onesies. Sized 0-3 months. They grow out fast.
• 1 to 3 months: 6 to 8 onesies, sized 3-6 months.
• 3 to 6 months: 6 to 8, sized 6-9 months.
• 6+ months: 6 onesies plus separates (pants + tops).

Buy in 5-packs from Carter's or Burt's Bees for daytime, plus 2 to 3 zipper or magnetic onesies for night use.

Fabric matters more than closure type

You can have the fanciest closure on a stiff, scratchy fabric and your baby will fuss. Prioritize:

• Organic cotton. Standard for baby clothing. Soft after first wash.
• Bamboo viscose or rayon. Ultra-soft, regulates temperature. More expensive.
• Cotton-modal blend. Slightly silkier than pure cotton.
• Avoid 100% polyester for newborns. Less breathable, can hold heat.

Newborn-specific fits

Look for:

• Wider neck openings. "Envelope necks" with overlapping panels so you can pull a poop-stained onesie down (not over the head) during blowouts.
• Folding cuffs (mittens). To prevent face-scratching in the first month.
• Footed onesies vs. separate socks. Newborns lose socks. Footed onesies solve this.
• Long enough torso. Newborn onesies should reach at least to mid-diaper without pulling at the shoulders.

The newborn-blowout escape route

One of those things no one tells you: when a poop blowout happens (and it will), you pull the onesie DOWN over the shoulders, not up over the head. The "envelope neck" on most newborn onesies is designed for this. Pull at the shoulders, push the onesie down past the legs, and the mess never touches the head.

Carter's, Burt's Bees, and most major brands have envelope necks on their newborn sizes. Some boutique brands skip this and you regret it the first time.

Washing newborn onesies

• Wash before first wear. Removes manufacturing residues and softens fabric.
• Use a fragrance-free baby detergent. Dreft, Babyganics, or your regular hypoallergenic option. Skip strong fragrances and fabric softeners.
• Wash on warm or cool. Hot water shrinks cotton.
• Hang to dry or tumble low. Reduces wear on zippers and magnets.
• Spot-treat poop stains immediately. A blowout left to set is a stain forever. Cold water rinse + a stain stick like Carbona Stain Devils #6 works.

The bottom line

Stock 8 to 10 snap onesies (Carter's or Burt's Bees) for daytime and 2 to 4 zipper or magnetic onesies (Kickee Pants, Magnetic Me) for nights. Total wardrobe cost for the first 3 months: $80 to $150 depending on the mix. Skip the boutique brands until you know what fits your baby.

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The Gear Desk

Reviewed by a real-mom testing panel · Updated May 2026