Lightweight Eco Onesie | Soft, Breathable and Built for Warm Weather Babies

Designed for those warmer months, this onesie keeps your baby cool, comfortable and effortlessly dressed from morning to nap time. Our Lightweight Eco Onesie is crafted for babies who run warm or live in hot climates, soft, airy and kind to delicate skin.

Made from our signature EcoCosy sustainable textile at 180gsm, this onesie is as breathable as cotton and as soft as silk. Spun from wood cellulose viscose from sustainably managed plantations, EcoCosy is lightweight, moisture-wicking and gentle enough for even the most sensitive newborn skin.

Designed for Real-Life Parenting

Every detail is thoughtfully considered to make daily changes easier for new mums:

• Double-ended two-way zip for quick, stress-free nappy changes without fully undressing your baby
• Fold-over feet to easily adapt between covered and uncovered
• Built-in hand mittens (size 000) to help prevent scratching
• Added crotch length for extra room to accommodate bulkier nappies
• Silky soft EcoCosy fabric that is gentle on sensitive newborn skin

Sustainable Quality You Can Rely On

EcoCosy is produced with a lower environmental impact without compromising on feel or function. Lightweight enough for summer sleep, breathable enough for a day out. This is the onesie you will reach for on every warm day.

A true warm-weather wardrobe essential you will use on repeat.

Why Mums Love This Onesie

• Keeps babies cool and comfortable in warm and humid weather
• Silky soft fabric with no irritation on delicate skin
• Sustainable material you can feel good about
• Versatile enough for sleep, play and outings
• Easy nappy changes day and night

Key Feel: Silky, featherlight, smooth and breathable. 

Lightweight Eco Onesie vs Ribbed Onesie | Which One is Right for Your Baby?

Not sure which to choose? Here is a simple guide to help you decide.

Lightweight Eco Onesie (180gsm) Best for warm weather, summer sleep and eco-conscious families

• Silky smooth EcoCosy sustainable fabric
• Ultra-lightweight and moisture-wicking
• Ideal for hot and humid Australian weather
• Added crotch length for nappy comfort
• Key feel: featherlight, silky, breathable and cool

Ribbed Onesie (250gsm) Best for everyday all-season wear and layering

• Premium ribbed cotton and spandex blend
• Medium weight with natural stretch
• Perfect for mild to cool weather and layering
• Higher neckline for added coverage
• Key feel: soft, gently stretchy and breathable

Fabric and Care

• 180gsm EcoCosy sustainable textile (wood cellulose viscose)
• Cold gentle machine wash with like colours
• We recommend cold hand washing for longevity
• Do not use fabric softeners on baby sleepwear
• Please see attached safety label in the liner of the garment for fire danger information
• Refer to care label for full instructions

Please note: colours may appear slightly different from actual items due to lighting or screen settings.

Best For

• Hot/ humid weather 
• Babies with sensitive or eczema-prone skin
• Overnight sleepwear in warm climates
• Eco-conscious parents
• Baby shower gifts for summer babies

Frequently Asked Questions

What is EcoCosy fabric made from?

EcoCosy is a sustainable textile made from wood cellulose viscose sourced from responsibly managed plantations. It is breathable, moisture-wicking and incredibly soft, making it ideal for newborns with sensitive skin.

Is the Lightweight Eco Onesie suitable for newborns?

Yes. The silky soft EcoCosy fabric is gentle on delicate newborn skin and the added crotch length accommodates bulkier nappies comfortably.

Can my baby wear the Lightweight Eco onesie to sleep in summer?

Absolutely. The 180gsm weight and moisture-wicking properties make it one of the best options for overnight sleep during warm Australian summers.

Complete the Look

Pair with our Baby Beanies for cooler mornings, or add a sweet finishing touch with the Ribbed Knotted Headband or Apple Headband for little girls.

Love EcoCosy? Explore the Full Lightweight Range

If you love the feel of EcoCosy, you will love our other lightweight pieces too. The Mini Ribbed Romper is a favourite for daytime play and warmer days, while the Lace Frill Romper adds a beautiful feminine touch without compromising on breathability. Explore the full Lightweight Collection to build your warm-weather wardrobe.

Not sure which fabric is right for your baby? Read our guide: What are the best fabrics for newborn clothes?

Measurements are taken relaxed, from shoulder to foot.