Before choosing the perfect sleepsuit, it is vital to understand the "why" behind safe sleep.

Why Nighttime Dressing is Critical for Safety

Unlike adults, babies cannot simply kick off a heavy duvet if they feel too hot. Their ability to regulate their own body temperature is still developing, making them vulnerable to both the cold and, more dangerously, overheating. According to The Lullaby Trust, maintaining a safe temperature is one of the most effective ways to reduce the risk of Sudden Infant Death Syndrome (SIDS).

The Danger of Overheating

Research shows that babies are much safer when they are slightly too cool rather than too warm. Overheating can lead to a deep sleep from which it is harder for a baby to wake. Our goal is to keep them in that "just right" zone where they are snug but their skin feels clear and dry.

Quick Temperature Check: The Chest Test

Forget cold hands and feet—these are normal for babies! To get an accurate reading, feel your baby’s chest or the back of their neck. If the skin feels hot, clammy, or sweaty, they are too warm and need a layer removed.

The Golden Rule: The 16-20°C Standard

The NHS and Lullaby Trust both recommend that the ideal room temperature for a sleeping baby is between 16°C and 20°C.

Managing the Nursery Environment

While it can be tempting to turn the heating up during a British winter, it is much safer to dress your baby in appropriate layers than to overheat the room. Use a reliable nursery thermometer to keep track of the temperature throughout the night.

Understanding TOG Ratings and Layering

TOG stands for "Thermal Overall Grade." It is a measure of how much heat a garment (usually a sleep bag) retains.

The TOG Guide

• 3.5 TOG: For very cold rooms (below 16°C).
• 2.5 TOG: The standard for most UK winters (16-20°C).
• 1.0 TOG: Ideal for spring and autumn or warmer rooms (20-24°C).
• 0.5 TOG: Best for summer heatwaves (above 24°C).

Nighttime Layering Formulas

• 18°C Room: A 2.5 TOG sleep bag + a long-sleeved cotton sleepsuit.
• 20°C Room: A 2.5 TOG sleep bag + a short-sleeved bodysuit.
• 24°C+ Room: A 0.5 TOG sleep bag + a vest, or just a nappy in extreme heat.

Explore our collection of organic cotton bodysuits, which serve as the perfect breathable base layer for any night.

The Sleep Wardrobe: What Works Best

100% Natural Fibres

At Trotters, we advocate for 100% cotton and wool. Synthetic fabrics like polyester can trap heat and moisture against the skin. Natural fibres allow the skin to breathe, which is essential for temperature regulation. View our temperature-regulating baby sleepwear designed with safety first.

Sleepsuits vs. Two-Piece Pyjamas

For newborns and young babies, a one-piece sleepsuit is ideal as it stays in place and keeps their feet warm. As they reach 12-24 months, two-piece sets can be a practical choice for late-night nappy changes.

Prohibited Items: What to Avoid in the Cot

To keep the sleep environment as safe as possible, the following items should never be in the cot:

• Pillows and Duvets: Not safe for babies under 12 months due to suffocation risks.
• Cot Bumpers: These can cause overheating and are a tangle hazard.
• Loose Blankets: A sleep bag is a much safer alternative.
• Soft Toys: Keep the cot clear of all toys until your baby is older.

The No-Hat Rule

Never put your baby to bed in a hat. Babies release heat through their heads. If the head is covered, they cannot cool themselves down, which significantly increases the risk of overheating.

Age-Specific Sleep Dressing

Newborns (0-3 Months)

Newborns are particularly vulnerable. Focus on simple, soft layers. Discover our complete newborn sleepwear essentials for the safest start.

Older Babies (6-24 Months)

As babies begin to roll and move, a sleep bag becomes even more useful as it won't get tangled like a blanket might. Ensure the neck hole is the correct size so they cannot slip down inside the bag.

Common Bedtime Mistakes to Avoid

1. Over-dressing for "Cold" Feet: Remember, cool extremities are normal; check the chest instead.
2. Leaving Outdoor Clothes On: Never let a baby sleep in a pram suit or coat once you are indoors.
3. Using the Wrong TOG: Always check the nursery temperature before deciding on the night's outfit—don't just guess based on how you feel.

Frequently Asked Questions

• How can I tell if my baby is too hot at night? Check the chest or back of the neck for sweat or heat.
• Is it okay for a baby to sleep in just a nappy? Yes, during a summer heatwave (above 24°C), a nappy and a very light vest or 0.5 TOG bag is perfectly safe.
• When can my baby have a pillow? Only after they are one year old.

Creating a safe sleep environment is one of the greatest gifts you can give your child. By choosing quality fabrics and following safe sleep guidelines, you can ensure that every night is filled with sweet dreams.

Ready to give your baby the safest, most comfortable nights possible? Explore our complete collection of premium baby sleepwear, designed with UK safety standards and expert sleep guidance in mind.