Internal Protective Cover No Mattress Features: Layer 1 Comfort Layer Mattress Features: Layer 2 Coconut Coir Mattress Features: Layer 3 Organic Protection Mattress Features: Layer 4 Support system ''Butterfly'' Mattress Features: Layer 5 Ergonomic Spring System Mattress Features: Layer 6 Organic Protection Mattress Features: Layer 7 Comfort Layer Mattress Features: Layer 8 Bliss
* Attention. Product description can be obtained by machine translation.