Complimentary Shipping: U.S. Contiguous Orders 100-Night Sleep Test Warranty: 10-Year Limited (No-Cost Replacement) & Limited Lifetime (Prorated Charge) Thick Foam Layers Enhanced Support Suitable for All Sleeping Styles Helix Plus is a hybrid mattress tailored for heavier individuals. It offers a medium firmness, featuring high-density foam and reinforced steel coils for enhanced support.