Organic Baby Summer Sleepwear

When temperatures rise, switching to lighter sleepwear isn’t just a nice-to-have - it’s one of the easiest ways to help babies sleep more comfortably and safely through the night. As babies are not able to regulate their own body temperature so well, a 0.5 TOG sleeping bag is designed specifically for warmer room temperatures above 24°C, making it the ideal choice for hot summer nights, heatwaves and family holidays abroad.

Our award-winning 0.5 TOG baby sleeping bag has no thick padding, allowing air to circulate more freely around your little one while still creating the cosy, secure feeling babies need for sleep. It’s why summer sleep sacks for babies are such a trusted choice for warmer weather - they help prevent overheating while removing the need for loose blankets in the cot.

The Lullaby Trust - a renowned charity which promotes safer sleep for babies - lists sleeping bags as an essential safer sleep product because they help reduce the risk of blankets covering a baby’s face overnight. At MORI, we’ve added thoughtful safety features to every design, including a fitted neck opening, adjustable armholes and secure fastenings to help prevent slipping. Sleeping bags also help stop little wrigglers from kicking off blankets and waking themselves during the night.

Parents love the practical details too. The double-direction zip makes overnight changes quicker and less disruptive, while the clever pushchair opening means naps can continue comfortably on the move. Designed to fit from 4kg up to 2 years, there’s plenty of room for little wrigglers to move, stretch and grow comfortably for years in the same sleeping bag.

The Science of Summer Sleep: Breathable Baby Summer Sleepsuits & Fabrics

On hot nights, what babies wear underneath their sleeping bag matters just as much as the TOG itself. Heavy layers can quickly lead to overheating, which is why a lightweight baby summer sleepsuit are one of the simplest ways to help little ones sleep better during warmer weather.

Our baby summer sleepsuits are designed with breathable short sleeves and short legs to improve airflow while keeping babies comfortable overnight. Every MORI sleepsuit is crafted from carefully selected fabrics designed to regulate temperature naturally while feeling soft against delicate skin.

Our signature bamboo and organic cotton blend acts almost like a gentle “air conditioning” layer for the skin. It’s naturally breathable, moisture wicking and thermoregulating, helping babies stay cool, dry and comfortable overnight. The hypoallergenic fabric is especially helpful for little ones prone to heat rash or sensitive skin during warmer weather.

Alongside our signature fabric, ribbed styles offer gentle stretch for wriggly sleepers, while our modal fabric made from sustainably sourced beechwood fibres feels especially lightweight and silky-soft for warmer nights. Our concealed zips with safety tabs also help make changes quicker and easier at 2am.

Available in playful character favourites, timeless neutrals and summer-inspired prints like ocean, lemon and brunch, our baby summer sleepsuits are designed to become part of a calming bedtime routine little ones recognise, whether they wear pyjamas or a summer baby sleep suit.

Lightweight Baby Summer Pyjamas for Toddlers & Older Kids

As babies grow into toddlers and older children, sleepwear needs to change too. That’s where lightweight baby summer pyjamas, newborn summer pajamas, and breathable two-piece sets come in - offering the same comfort and temperature regulation as sleepsuits, with a little more independence for growing little ones.

Our baby summer pyjamas and PJ sets for older kids are designed to help children stay cool and settled during warmer nights, with soft elasticated waistbands, breathable fabrics and relaxed fits that move comfortably with them while they sleep.

Families often transition from sleepsuits into pyjamas because they’re easier for older toddlers and children while still maintaining that familiar bedtime comfort. Selected styles are available up to 8 years, so children can continue enjoying the same soft, breathable fabrics throughout childhood.