Firmness

• Soft (1)
• Medium (2)
• Medium Firm (4)
• Firm (3)

Material

• X-Foam (5)
• X-Foam + High carbon steel independent spring (1)

Maintenance period

• 3 years maintenance (1)
• 5 years maintenance (4)
• 20 years maintenance (1)

Thickness

• 4" or below (3)
• 5”–8.75” (2)
• 9" or above (1)

Customize the size

• Yes (5)
• No (1)