King Split Head Flex Top Replacement Medium Regular Foam | Sleep Number Comparable Comfort Layer for FlexTop Beds

A medium-firm replacement comfort foam cut for King Split Head Flex Top Sleep Number beds, where the head of the mattress splits into two independent sections so each side can articulate on a FlexFit adjustable base. This is the same foam we offer for standard sizes — matched to the feel of Sleep Number's original regular foam — configured for the split-head FlexTop King.

Medium feel, 1.8 density, 35 ILD. Made by Carpenter and CertiPUR-US tested. It gives more support than worn original foam — no sinking sensation and no firm “boardy” feeling — and is designed to firm up your mattress and bring back the supportive feel it had when new, eliminating body impressions and sagging. A true happy-medium: not so soft you bottom out, but firm enough to support you while still cradling your pressure points.

Great For

• Restoring support to a worn or sagging FlexTop King Sleep Number bed
• Matching the original “regular foam” feel on split-head models
• Eliminating body impressions in the comfort layer over your air chambers

Available Heights

1", 2", 3", and 4" — select at checkout.