How to Fit a Sebra Junior Roll Mattress to Your Crib
By sebra Officielle Webshop | Published: 2026-10-27
Category: How-to Guides
Learn the simple steps to install a Sebra junior roll mattress (70x155 cm) in your extended crib. Get a snug, protective fit for your child's bed.
Quick answer
Place the Sebra junior roll mattress directly on top of your crib mattress, centered evenly, and secure it with the corner elastics under the mattress corners. This protective layer shields the main mattress from accidents and keeps the bed fresh.
Why use a roll mattress for the junior bed extension
When you extend your Sebra Sleep crib to the junior length (155 cm), the standard mattress may not fully cover the extended area, or you simply want an extra layer of protection. The Sebra junior roll mattress (70x155 cm) sits between the mattress and the sheet, acting as a barrier against spills and small accidents. Its organic cotton construction is soft yet durable, and the corner elastics keep it flat and secure without shifting during sleep.
Step-by-step fitting guide
- Prepare the bed: Remove all bedding (sheets, mattress protector) from the crib mattress. Ensure the crib is extended to the junior length (155 cm) and the main mattress is centered. Check that the main mattress is flat and free of debris before placing the roll mattress.
- Position the roll mattress: Unroll the Sebra junior roll mattress and place it directly on top of the crib mattress, aligning it evenly from head to foot. The 70x155 cm size should match the full length of the junior bed. Make sure the roll mattress is not bunched or folded—it should lie completely flat.
- Secure the corner elastics: Stretch each of the four corner elastics over the corresponding corners of the crib mattress. The elastic should grip the mattress snugly without pulling the roll mattress out of position. If an elastic slips off, re-center the roll mattress and try again—it must hold firmly to prevent shifting.
- Smooth and check for wrinkles: Run your hands over the roll mattress to smooth out any wrinkles or air pockets. The surface should be taut and even. A wrinkled roll mattress can cause discomfort; re-stretch the elastics if needed.
- Add the fitted sheet: Place a standard junior-sized fitted sheet over both the roll mattress and the crib mattress. Tuck the sheet edges under the crib mattress to hold everything in place. Use a sheet with deep pockets to accommodate the added thickness of the roll mattress.
Product details
- Sebra Rullemadrassen, junior 70 x 155 cm - Sebra Sleep - White: Made from certified organic cotton with elastic in all corners to keep it flat and secure. The organic cotton is gentle on sensitive skin, and the elastics prevent bunching or sliding, so the mattress stays smooth under the sheet.
Sebra Rullemadrassen, junior 70 x 155 cm - Sebra Sleep - White
