Last updated at 16/10/2026 12:23:50
Sealy Advantage Harper Firm Mattress King Single HAR-FRM-KSG
Free delivery by Mon
| Firmness Level | Firm |
| Mattress Type | Innerspring |
| Type | Mattress |
| Length | 2030 MMT |
| Width | 915 MMT |
Sealy Advantage Harper Firm Mattress King Single HAR-FRM-KSG
Free delivery by Mon
| Firmness Level | Firm |
| Mattress Type | Innerspring |
| Type | Mattress |
| Length | 2030 MMT |
| Width | 915 MMT |
Engineered for those who prefer firmer support without sacrificing comfort, the Harper range is a standout solution in sleep technology. This collection combines thoughtful design and durable components to deliver a mattress that holds its shape, supports your posture, and enhances rest for years to come. At the core of every Harper mattress is the trusted CoreSupport spring system. This Sealy-exclusive technology features a single-stage, twice-tempered coil system with six active turns, designed to deliver consistent deep-down support while contouring gently to the body's pressure points. It’s a perfect match for sleepers who value firmness, structure, and full-body alignment. Harper also includes the innovative EdgeGuard support system, extending the mattress’s usable surface and reinforcing its perimeter. This means a more stable seating edge and confident edge-to-edge sleep support—especially important for those who move around during the night or share their bed. HealthShield antimicrobial treatment is integrated into the comfort layers to create a cleaner, healthier sleep environment, while rigorous product testing ensures long-term performance and resilience. Perfectly paired with any Sealy base—including standard, adjustable, or storage designs—Harper brings together practicality, hygiene, and superior value. It’s an ideal choice for anyone seeking a firm feel backed by intelligent construction and trusted Australian craftsmanship.
Engineered for those who prefer firmer support without sacrificing comfort, the Harper range is a standout solution in sleep technology. This collection combines thoughtful design and durable components to deliver a mattress that holds its shape, supports your posture, and enhances rest for years to come. At the core of every Harper mattress is the trusted CoreSupport spring system. This Sealy-exclusive technology features a single-stage, twice-tempered coil system with six active turns, designed to deliver consistent deep-down support while contouring gently to the body's pressure points. It’s a perfect match for sleepers who value firmness, structure, and full-body alignment. Harper also includes the innovative EdgeGuard support system, extending the mattress’s usable surface and reinforcing its perimeter. This means a more stable seating edge and confident edge-to-edge sleep support—especially important for those who move around during the night or share their bed. HealthShield antimicrobial treatment is integrated into the comfort layers to create a cleaner, healthier sleep environment, while rigorous product testing ensures long-term performance and resilience. Perfectly paired with any Sealy base—including standard, adjustable, or storage designs—Harper brings together practicality, hygiene, and superior value. It’s an ideal choice for anyone seeking a firm feel backed by intelligent construction and trusted Australian craftsmanship.
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last seen 16 Oct 2026
The lowest price we last saw for Sealy Harper Firm Mattress King Single HAR-FRM-KSG was $516.00 at Appliances Online Australia (last seen 16 Oct 2026). Prices may have changed since.
The all-time low we recorded was $409.00 on 1 July 2026.
Prices last updated 16 Oct 2026.
Sealy Harper Firm Mattress King Single HAR-FRM-KSG
Engineered for those who prefer firmer support without sacrificing comfort, the Harper range is a standout solution in sleep technology. This collection combines thoughtful design and durable components to deliver a mattress that holds its shape, supports your posture, and enhances rest for years to come. At the core of every Harper mattress is the trusted CoreSupport spring system. This Sealy-exclusive technology features a single-stage, twice-tempered coil system with six active turns, designed to deliver consistent deep-down support while contouring gently to the body's pressure points. It’s a perfect match for sleepers who value firmness, structure, and full-body alignment. Harper also includes the innovative EdgeGuard support system, extending the mattress’s usable surface and reinforcing its perimeter. This means a more stable seating edge and confident edge-to-edge sleep support—especially important for those who move around during the night or share their bed. HealthShield antimicrobial treatment is integrated into the comfort layers to create a cleaner, healthier sleep environment, while rigorous product testing ensures long-term performance and resilience. Perfectly paired with any Sealy base—including standard, adjustable, or storage designs—Harper brings together practicality, hygiene, and superior value. It’s an ideal choice for anyone seeking a firm feel backed by intelligent construction and trusted Australian craftsmanship.
Engineered for those who prefer firmer support without sacrificing comfort, the Harper range is a standout solution in sleep technology. This collection combines thoughtful design and durable components to deliver a mattress that holds its shape, supports your posture, and enhances rest for years to come. At the core of every Harper mattress is the trusted CoreSupport spring system. This Sealy-exclusive technology features a single-stage, twice-tempered coil system with six active turns, designed to deliver consistent deep-down support while contouring gently to the body's pressure points. It’s a perfect match for sleepers who value firmness, structure, and full-body alignment. Harper also includes the innovative EdgeGuard support system, extending the mattress’s usable surface and reinforcing its perimeter. This means a more stable seating edge and confident edge-to-edge sleep support—especially important for those who move around during the night or share their bed. HealthShield antimicrobial treatment is integrated into the comfort layers to create a cleaner, healthier sleep environment, while rigorous product testing ensures long-term performance and resilience. Perfectly paired with any Sealy base—including standard, adjustable, or storage designs—Harper brings together practicality, hygiene, and superior value. It’s an ideal choice for anyone seeking a firm feel backed by intelligent construction and trusted Australian craftsmanship.
