Sleepsuit 1.0 TOG - Mermaids

Watercolor mermaids — the soft-pastel under-the-sea pattern.

The 6–18M sleep problem: baby has outgrown the swaddle, wants their arms free, but still needs wearable-blanket warmth. A closed sleep bag becomes a trip hazard once the baby is walking in the crib. Pajamas alone are too cold for the 69–75°F nursery overnight.

This is what goes in between.

Material. TENCEL™ Lyocell shell with DuPont™ Sorona insulation, 1.0 TOG. Wood-pulp fiber on the outside, plant-based polymer insulation on the inside. The same material structure as the 1.0 TOG sleep bag, with separated legs so the toddler can walk, stand, and crawl in it.

The print. Ivory ground with watercolor mermaids in pastel pink and peach with brown hair, peach binding.

Construction. Sleeveless — closed arms are how you overheat a winter baby; the warmth math lives in the body of the suit, not the limbs. Separated legs that hit just below the knee — long enough to keep warm, short enough not to drag. 2-way zipper from the chin to the inner thigh on each leg, so a diaper change doesn't require unzipping the whole garment. Hidden seams. Fabric guard at the zipper top for sensitive necks.

When to switch from sleep bag to sleepsuit. Most families switch around 12–15 months, when the baby is walking confidently in the crib. The closed-leg sleep bag becomes a trip hazard at that point. The sleepsuit gives the same TOG warmth with mobility. Some families switch earlier if the baby protests the closed-leg bag; others stay in sleep bags longer if the baby is content.

Why most premium brands skip this format. The sleepsuit category is small — most premium sleepwear brands jump from sleep bags straight to pajamas, leaving walking toddlers either staying in a sleep bag they're trying to step out of, or jumping into pajamas in a nursery that's too cold for pajamas alone. We make the sleepsuit because the gap is real.

Adjacent products. The 1.0 TOG TENCEL™ Sleep Bag is the pre-walking version of this garment. Browse the full sleepsuit collection or pair with a long-sleeve TENCEL™ sleeper as the under-layer.

Sizing. 6–18M, 18–24M, 2T. Size to current weight and height.

Care. Machine wash cold, tumble dry low. Do not bleach. Do not iron printed panels.

Safety & certification. AAP safe-sleep compliant. Tested to CPSC, CPSIA, and ASTM standards. Material certified to OEKO-TEX Standard 100. Loulou Lollipop is a Certified B Corporation.

Browse all TENCEL™ sleepsuits.

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