The Semi-Flex® performance grid steel mattress foundation is an ultra-supportive boxspring option that's stronger, lasts longer, and creates less noise than all-wood alternatives.

  • Reinforced grid adds surface coverage and enhances stability.
  • A "stronger" and more convincing message.
  • Available in a range of height profiles.
  • Fast and efficient assembly.

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Active Support

Dynamic response to natural body movements delivers the support needed for deep, relaxing sleep.

Sleep Cool

Innersprings transfer heat 28% more efficiently than foam and are cooler on initial contact.


Coils retain their consistent shape and support qualities for years of comfort and reliability.