The Harper Medium from Spring Air is a Grand Hybrid mattress designed to deliver that “just right” feel— a balanced comfort level with cooling features on top and targeted support underneath. With multiple cooling layers, breathable comfort foam, and zoned individually pocketed coils, the Harper helps you sleep cooler while staying supported from edge to edge.

Cooling comfort for pressure relief

• Maximum Cooling Cover (Phase-Change): Added phase-change cooling for a higher level of temperature control.
• Cool Gel Memory Foam: High-quality memory foam with COOL GEL for pressure relief and a cooling effect.
• High-Performance Cooling Foam: Helps reduce heat build-up through the comfort layers.
• Breathable Serene™ Foam: Extremely breathable foam designed for long-lasting pressure relief with temperature regulation.
• Cooling Layers: 4 total cooling layers.

Support that adapts to you

• Back Supporter™ Zoned Coils: 25% thicker coils in the center 1/3 of the mattress for added lumbar support.
• Zoned Individually Pocketed Coils: Coils respond independently to your body for personalized comfort and support.
• Twice-Tempered Coils: Built for durable, consistent support that adjusts to your comfort needs.
• Foam Encasement + High-Density Foam: High-density support foam creates lasting edge-to-edge support and a larger usable sleep surface.

Mattress details

• Comfort level: Medium
• Height: 14"
• Made in America
• CertiPUR-US® Certified Foams
• Award: Women’s Choice Award winner
• Warranty: Limited 15-Year Non-Prorated