Baby Sleep TOG Guide

Baby Sleep TOG Guide: Dress for Comfort at Every Room Temperature

Choosing the right TOG rating keeps your little one comfortable and safe all night. Use this simple UK-focused guide to match your room temperature with the ideal sleepwear.

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What is a TOG?

TOG (Thermal Overall Grade) measures warmth. The higher the number, the warmer the garment. Always choose TOG by room temperature, not the weather outside.

  • 0.5 TOG – Light for warm rooms 24Β°C+
  • 1.0 TOG – Moderate for 20–23Β°C
  • 1.5 TOG – Mild for ~18–22Β°C
  • 2.5 TOG – Cosy for 16–19Β°C
  • 3.5 TOG – Extra warm for ≀15Β°C

These bands align with common UK guidance used by leading brands; always check your baby's neck and chest, not hands or feet.

Room Temperature vs. TOG: Quick Chart

Room Temp (Β°C) Recommended TOG Example Outfit Season
24Β°C and above 0.5 TOG Lightweight sleep suit or short-sleeve bodysuit Summer
20–23Β°C 1.0 TOG Long-sleeve bodysuit under sleep suit Spring / Autumn
16–19Β°C 2.5 TOG Long-sleeve bodysuit + sleeping bag or sleep suit Winter
15Β°C or below 3.5 TOG Heavier sleeping bag with a single underlayer Very cold

Bag or Suit?

Choose a roomy sleeping bag for babies; switch to a sleep suit with legs as they start standing and walking.

Feature Sleeping Bag Sleeping Suit
Best for Newborns < 12m Toddlers 12m+
Movement Calms startle reflex Allows standing/walking

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Safety & Certifications


  • GOTS Organic Cotton & OEKO-TEX Standard 100 fabrics
  • Designed in the UK by a Certified Baby Sleep Consultant
  • No flame retardants or harsh chemicals

Quick FAQs

What TOG at 18Β°C?

Usually 2.5 TOG with a long-sleeve bodysuit for most babies.

Can I layer two TOGs?

No β€” a single TOG garment + one light underlayer is best.

How do I check comfort?

Feel the back of the neck/chest (not hands/feet). Warm and dry is ideal.