![Bought a cot and mattress (Krummelur) from Ikea, but don't know which way is up for the mattress. One side is ribbed and the other is flat, so I assume orientation matters. Bought a cot and mattress (Krummelur) from Ikea, but don't know which way is up for the mattress. One side is ribbed and the other is flat, so I assume orientation matters.](https://styles.redditmedia.com/t5_2s9a5/styles/communityIcon_h4z150vocywb1.png)
Bought a cot and mattress (Krummelur) from Ikea, but don't know which way is up for the mattress. One side is ribbed and the other is flat, so I assume orientation matters.
![IKEA baby crib / cot (with or without new Krummelur mattress), Babies & Kids, Baby Nursery & Kids Furniture, Cots & Cribs on Carousell IKEA baby crib / cot (with or without new Krummelur mattress), Babies & Kids, Baby Nursery & Kids Furniture, Cots & Cribs on Carousell](https://media.karousell.com/media/photos/products/2024/1/9/ikea_baby_crib__cot_with_or_wi_1704784098_64745b85_progressive.jpg)
IKEA baby crib / cot (with or without new Krummelur mattress), Babies & Kids, Baby Nursery & Kids Furniture, Cots & Cribs on Carousell
![Ikea baby cot mattress bumper pad, Babies & Kids, Baby Nursery & Kids Furniture, Cots & Cribs on Carousell Ikea baby cot mattress bumper pad, Babies & Kids, Baby Nursery & Kids Furniture, Cots & Cribs on Carousell](https://media.karousell.com/media/photos/products/2020/03/08/ikea_baby_cot_mattress_bumped_pad_1583637526_ca9dc824_progressive.jpg)