Bamboo Muslin Lightweight Baby Sleep Bag 0.5 TOG - Unicorn Ballet

Unicorns, tutus, the soft pink phase you knew was coming.

0.5 TOG. The warm-weather sleep bag. Built for nursery temperatures between 75 and 81°F — summer nights, top-floor bedrooms, homes that don't run central AC. The weight you reach for at 11 p.m. on a sweaty August night when a 1.0 TOG has your baby sweating through the back.

Material. Tanboocel viscose from bamboo and cotton, woven into an open-weave muslin. Two notes on the fiber. Tanboocel is a branded viscose-from-bamboo fiber produced through a closed-loop process that's a step beyond generic bamboo viscose — third-party verified, lower water and chemical footprint. We use it only on our 0.5 TOG muslin pieces, our swaddles, and our crib sheets. It is not the same thing as the bamboo rayon most baby brands describe as "bamboo." It's softer after the fifth wash than it is on day one, which is the opposite of how cotton ages.

The print. Pale pink ground with hand-drawn unicorns in ballet poses — the print that gets requested by name.

Construction. Sleeveless, so the arms can release heat. 2-way zipper that opens from the bottom so a midnight diaper change doesn't require lifting a hot baby out of the bag. Soft fabric binding at the neck and arms — no scratchy serged edges against skin. Fits true to size at the shoulders, which is the dimension that matters for safe sleep.

Why 0.5 TOG matters. Most premium sleep-sack brands skip this weight — the lightest options on the market typically start at 0.6 or 0.7 TOG and read warmer in practice. That leaves families with warm nurseries doing one of two things — laying a blanket over the baby (which the AAP doesn't recommend) or skipping the sleep sack entirely. The 0.5 TOG muslin is the answer for both.

Need a warmer weight? The matching 1.0 TOG TENCEL™ Sleep Bag in Unicorn Ballet is built for the everyday 69–75°F nursery. The 2.5 TOG winter weight picks up below 68°F.

Sizing. 0–6M (fits 8–18 lb), 6–18M (fits 18–28 lb), 18–36M (fits 28–38 lb). Always size to current weight, not age. A bag that's too large at the shoulders can ride up over the face overnight.

Care. Machine wash cold, tumble dry low. Tanboocel handles the dryer better than bamboo rayon — fewer pill bumps, less shrinkage over a year of weekly washes. Do not bleach. Do not iron the screen-printed area.

Compliance. OEKO-TEX Standard 100 on the fabric, CPSC/CPSIA/ASTM on the garment, AAP safe-sleep guidance on the design. Loulou Lollipop is a Certified B Corporation — a third-party audit of how we treat people and the planet, not a self-claim.

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Free US shipping on orders over $65. Free returns within 30 days, unworn and in original packaging.