Cotton baby onesies with snap closure for newborns and infants. Short sleeve for warm months, long sleeve for cooler weather, and fleece one-pieces for layering. All in gender neutral colours, pre-shrunk, and machine washable.
Cotton Baby Onesie | Soft Short Sleeve Infant Bodysuit
+10 more
Baby Fleece Bodysuit | Warm Cotton Infant One-Piece
+3 moreThe Infant Wardrobe Essential
Buyer's Guide
Baby onesies run in: NB (up to 8 lbs), 0-3M, 3-6M, 6-12M, and 12-18M. Most newborns move through NB in 2-4 weeks. Buy primarily in 0-3M and 3-6M for the first three months. Sizing is based on weight and height — check the size chart on each product page if your baby is between sizes.
Short sleeve onesies are the everyday staple — worn solo in warm weather and as a base layer in cooler months. Long sleeve onesies add arm coverage and work well in autumn and winter. Fleece one-pieces are a warm outer layer, not a base — they go over a short sleeve onesie in cold weather.
Snap closures on onesies should fasten securely but open easily with one hand — important during night changes. The snaps should be metal (not plastic) for durability through repeated washing. Check that snaps are positioned to open from either side for left- and right-hand use.
Machine wash cold, tumble dry low. Pre-shrunk cotton holds its size. Wash before first use to remove any manufacturing residue. Avoid high-heat drying — cotton onesies at high heat may develop pilling and lose softness faster than at low heat.
Why Parents Choose These
Combed ringspun cotton removes coarser fibres before spinning. The resulting yarn is finer and smoother — softer against infant skin and less prone to pilling through washing.
Envelope neck opening allows the onesie to be pulled down the body rather than over the head — useful for diaper blowouts. Snap closure at the crotch keeps the onesie in place and allows one-handed access during changes.
Designed to work for any baby without gender-specific colour coding. Useful before birth when the sex is unknown, for gifting, and for reusing across siblings.
Pre-shrunk before sale means the size you receive is the size it stays after washing. No surprise shrinkage on the first wash when the onesie is sized to fit your baby right now.
Tags in the collar area are a source of irritation for newborns. Tagless onesies remove this completely. Size information is printed directly on the fabric.
Every onesie in this range is covered by a 100-day guarantee. If snaps fail or fabric degrades within 100 days of normal infant use, contact us for a replacement.
What Parents Say
"I bought 6-packs in two sizes before my son was born. The snap closure is solid — still snapping properly after 3 months of daily use. The fabric is soft and has not gone rough after washing."
"Best onesies I have found. The envelope neck is genuinely useful — we have had a few blowout situations and being able to pull the onesie down rather than over the head made a difficult moment much easier."
"Stocked up in gender neutral colours before we knew the sex. Had a girl. Everything worked perfectly. Passing the 0-3M sizes to my sister who is expecting now."
Frequently Asked Questions
