f6685979__Personal_Comfort_A5__Mattress__Personal_Comfort
NeverSag™ Guarantee A Guarantee that normal foam compression, body impressions and air chamber thickness will not compress to 25% of the overall thickness of the mattress when the air chambers are fully inflated. [Sleep Number®] No [Personal Comfort] 
Yes Covered under our Limited Lifetime Warranty. Value added feature.
Sleep Number p5 Bed ® versus the Personal Comfort A5® Mattress
Personal Comfort