How to Create a Safe Sleep Environment for Your Baby

Quick answer

Place your baby on their back in a cot with a firm, flat mattress and a fitted sheet, and keep the sleep space completely clear of pillows, bumpers, toys, and loose blankets. Use a baby sleeping bag for warmth instead of a duvet, and keep the room comfortably cool. These safe sleep practices reduce the risk of SIDS and sleep accidents.

A safe sleep environment is less about buying the right products and more about removing the wrong ones. The safest cot is a bare cot: a firm mattress, a tight fitted sheet, and your baby. Everything else, from bumpers to soft toys, adds risk without adding comfort.

That said, a few well-chosen items make safe sleep easier to sustain night after night. A baby sleeping bag replaces loose blankets, a waterproof changing mat keeps night changes quick and calm, and a breathable muslin cloth handles spills without waking a drowsy baby. This guide walks through the setup step by step, with the common mistakes to avoid at each stage.

Start with the cot and mattress

Choose a cot that meets current safety standards and has fixed sides and slats no more than 6.5 cm apart. The mattress should be firm, flat, and fit the cot tightly with no gaps around the edges where a baby could slip. A mattress that is too soft or too small is one of the most common baby cot safety failures, and it is easy to check before the first night.

If you use a second-hand cot, inspect it for missing hardware, peeling paint, or drop-side mechanisms, which are no longer considered safe. Once assembled, shake the cot gently: it should feel solid with no wobble. A stable cot is the foundation of any baby sleep environment.

• Checkpoint: press the mattress edges. If you can fit more than two fingers between mattress and cot frame, the fit is too loose.
• Avoid cot bumpers, pillows, and sleep positioners, even for newborns.

Dress the cot for sleep, not for looks

Use only a fitted sheet over the mattress. That is the entire bedding setup for at least the first year. Loose blankets, quilts, and duvets can cover a baby's face or overheat them, so they belong outside the cot until your child is much older. If you want a decorative layer, keep it for a play area or a bed that your baby does not sleep in.

For warmth, a baby sleeping bag sized to your child's weight is the safer choice. It stays in place when your baby moves, cannot be kicked off, and removes the temptation to tuck in a loose blanket. Choose a tog rating that matches the room temperature, and check that the neck opening fits snugly so your baby cannot slide down inside it.

• Checkpoint: if you can pull the sleeping bag up over your baby's chin, the size is too large.
• Skip weighted sleep sacks and weighted blankets entirely for infants.

Set the room temperature and position the cot

A room between 16 and 20 degrees Celsius suits most babies, and overheating is a known SIDS risk factor. Feel your baby's chest or the back of their neck rather than their hands to judge warmth. Place the cot in your room for at least the first six months, ideally close to your bed but with its own sleep surface. Room-sharing without bed-sharing is one of the most protective safe sleep practices.

Keep the cot away from radiators, direct sunlight, windows with cords, and wall-mounted decor that could fall. Do not hang anything over the cot. If you use a baby monitor, route cables well out of reach, because cords are a strangulation hazard even when they seem tucked away.

• Checkpoint: no dangling blind or monitor cords within reach of the cot.
• Avoid placing the cot against a radiator or in direct sun.

Handle night feeds and changes without breaking the routine

Night wakings are part of the deal, but the goal is to keep the sleep space safe and the transition back to sleep calm. A waterproof changing mat with a soft, removable cover lets you change your baby quickly without stripping the whole cot. If you use a changing pad, always keep one hand on your baby, and never leave them unattended on a raised surface.

Keep the lights dim and your voice low. Avoid turning a night feed into playtime. When you put your baby back down, return them to their back on the firm mattress in the cot, even if they fell asleep while feeding. Consistency is what makes safe sleep work over months, not just on the first night.

• Checkpoint: put your baby back in the cot drowsy but not fully asleep when you can.
• Never fall asleep with your baby on a sofa or armchair.

Keep the sleep space clear as your baby grows

Once your baby can roll both ways, you no longer need to reposition them during sleep, but the cot should still stay clear. As they get older, they may want a comfort object. If you introduce one, choose a small, breathable item and keep it out of the cot until your pediatrician says it is appropriate, usually after the first year.

Avoid adding a pillow, duvet, or cot bumper as your baby becomes more mobile. Instead, keep the routine simple: fitted sheet, sleeping bag, and a clear cot. If your baby is teething or unwell, handle it with the same setup rather than piling on extra bedding.

• Checkpoint: do a two-minute cot check before every sleep, nap and night.
• Replace any sleeping bag that has a broken zip or loose stitching.

Your step-by-step safe sleep setup

1. 1. Assemble and check the cot: Build the cot with all original hardware, confirm the mattress fits tightly with no gaps, and shake the frame to test stability. Checkpoint: the mattress should not shift when you press the corners.
2. 2. Strip the cot to the basics: Use a fitted sheet only. Remove bumpers, pillows, toys, and loose blankets, and keep them out for every nap and night. Checkpoint: if you can see anything loose in the cot, take it out.
3. 3. Choose a baby sleeping bag for warmth: Pick a bag sized to your baby's weight with a snug neck opening, and match the tog rating to the room temperature. Checkpoint: the bag should not ride up over the chin.
4. 4. Position the cot in your room: Place the cot near your bed but as a separate surface, away from radiators, windows, and cords. Room-share for at least six months. Checkpoint: no cords or hanging decor within reach.
5. 5. Keep night care calm and contained: Use a waterproof changing mat for quick changes, keep lights dim, and return your baby to their back in the cot after feeds. Checkpoint: never leave your baby unattended on a raised changing surface.
6. 6. Recheck the cot before every sleep: Do a fast visual scan for loose items, tangled cords, or a sleeping bag that has come undone. Checkpoint: a clear cot is a safe cot, every single time.

Products that support safe sleep

• Waterproof changing mat & organic coton honeycomb cover Opera: Waterproof mat included with an extra-soft organic cotton honeycomb cover that is machine washable and easy to remove. Night changes stay quick and dry, so you can return your baby to the cot without a full bedding change.
• Insulated baby bottle and lunch bag Hyde Park: Insulated bag in printed organic cotton that holds up to two bottles and keeps them hot or cold. A night feed is easier when the bottle is already at the right temperature and within reach, so you avoid extra trips to the kitchen.
• Tassel rectangular cushion in washed double muslin Wabi-Sabi: Organic cotton double muslin cushion with tassels, hand-dyed and designed as a decorative piece. Use it in a reading corner or on a parent chair, never inside the cot, so the sleep space stays clear.

Safe sleep comes down to a few consistent habits: a firm mattress, a clear cot, a sleeping bag instead of blankets, and your baby on their back in your room. Set it up once, then recheck it before every sleep. If you have questions about your baby's specific needs, talk to your pediatrician.