It might be time to change your mattress now...
1st Layer: 180 Gr Bamboo Cotton Knitted Fabric
2nd Layer: 2 Cm Hr Sponge (Continuous)
3rd Layer: 0.1 Cm Woven Fabric (Continuous)
4th Layer: 1000 Gr Natural 4 Season Felt
5th Layer: Bonel Spring
Total product height: 20 ± 1 Cm