Quick answer

Choose a fitted cot sheet made from breathable organic cotton that fits snugly around the mattress without excess fabric. A safe sheet stays in place, reduces suffocation risk, and keeps your baby comfortable.

Why breathable fabric matters for sleep safety

A breathable fabric helps regulate your baby's temperature and reduces the risk of overheating, which is linked to SIDS. Organic cotton jersey is a top choice because it is naturally soft, stretchy, and allows air to circulate freely. Avoid synthetic blends that trap heat and moisture.

The right fit: why snug is non-negotiable

A loose sheet can bunch up and create a suffocation hazard. Always use a fitted sheet with elastic edges that grip the mattress firmly. Measure your cot mattress before buying — standard sizes vary by country, and some sheets are designed to fit multiple sizes, including Australian standard and Boori cots.

Organic vs. conventional cotton: what's the difference?

Organic cotton is grown without synthetic pesticides or fertilizers, making it gentler on your baby's sensitive skin and better for the environment. Conventional cotton may feel similar but can contain chemical residues. If your baby has eczema or allergies, organic is the safer choice.

Step-by-step guide to choosing a safe cot sheet

  1. Check the fabric: Choose 100% organic cotton jersey or another breathable natural fiber. Avoid polyester or blends that trap heat. Look for GOTS-certified organic cotton to ensure no harmful chemicals.
  2. Measure your mattress: Measure the length, width, and depth of your cot mattress. Compare with the sheet's dimensions to ensure a snug fit. A sheet that is too deep can loosen; one that is too shallow may pop off.
  3. Inspect the elastic: Run your hand around the sheet's hem. The elastic should be continuous and strong enough to grip the mattress firmly. Weak or partial elastic is a red flag — the sheet will not stay in place.
  4. Wash before first use: Wash the sheet in warm water with a gentle, fragrance-free detergent. This removes any manufacturing residues and pre-shrinks the fabric. Skipping the first wash may leave chemicals on the fabric and cause shrinkage after fitting.
  5. Do the tug test: After fitting the sheet, try to pull it away from the mattress corners. It should not lift more than an inch. If it does, the fit is too loose. Repeat the tug test after each wash — elastic can weaken over time.

Product spotlight

  • Organic Cot Sheet: This fitted cot sheet is made from organic cotton jersey and features a hand-illustrated all-over print. Organic cotton is breathable and free from harsh chemicals, so it helps keep your baby comfortable and reduces skin irritation risks.

    Organic Cot Sheet

    Organic Cot Sheet

  • Organic Cot Sheet: It is stretchy and fits a range of cots, including Australian standard size and Boori cots. A stretchy, well-fitted sheet stays securely on the mattress, reducing the chance of loose fabric that could pose a safety hazard.