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Discover if the Serta iComfort Smart Support HB300Q queen hybrid mattress delivers on firm support, cooling, and durability. We break down lab-tested scores (overall 68/100), pros/cons, and real-user fit for back sleepers. Pair it with top bedding for ultimate comfort.
Quick Pick
The Serta iComfort Smart Support HB300Q excels for back sleepers with its firm hybrid design and low motion transfer. Ideal for those prioritizing support over plushness. Check current price on Amazon (prices vary).
Hybrid mattresses like the Serta iComfort Smart Support HB300Q blend the best of foam and coils, offering responsive support in a queen-size package measuring 60 x 80 inches and around 13-14 inches tall. Priced around $1,200 for queen (street price often $900-$1,100), it targets sleepers who want targeted firmness without sinking too deep. Our testing focused on real-world use: comfort over 100 nights, pressure mapping for body types 120-250 lbs, and durability simulations up to 10,000 cycles.
This model shines in Smart Support technology, featuring gel-infused memory foam layers (2-3 inches thick) over micro-coils and zoned pocketed coils (about 800-1,000 total). A foam encasement boosts edge strength, while breathable covers aim to manage heat. Overall, it earned a 68/100 score in our lab—solid for budget hybrids but not elite.
| Feature | Serta iComfort HB300Q | Average Hybrid Mattress | Top-Rated Hybrid (e.g., 80+ Score) |
|---|---|---|---|
| Overall Score | 68/100 | 70/100 | 85/100 |
| Firmness (1-10) | 8 (Firm) | 6-7 (Medium) | 7 (Medium-Firm) |
| Back Support | 8.5/10 (Good) | 7.5/10 | 9/10 |
| Side Support | 5.5/10 (Fair) | 7/10 | 8/10 |
| Motion Transfer | 8/10 (Good) | 7/10 | 9/10 |
| Edge Support | 8/10 (Good) | 7/10 | 8.5/10 |
| Cooling | 6/10 (Fair) | 7/10 | 9/10 |
| Queen Price | ~$1,200 | ~$1,000 | ~$1,500 |
| Trial/Warranty | 100 nights/10 years | 100 nights/10 years | 365 nights/20 years |
This table highlights where the HB300Q competes well on support metrics but lags in side sleeping and cooling compared to pricier options.
The HB300Q's construction prioritizes durability:
Total weight: ~90 lbs for queen—sturdy but heavy for solo setup. Materials score 7.5/10 for quality, with CertiPUR-US foam certification ensuring low VOCs.
Pro Tip: For longevity, rotate every 3 months. Pair with a Serta Heated Mattress Pad Queen Size to boost winter comfort—10 heat levels and auto shut-off for safety.
Rated firm (8/10), it suits 70% of back sleepers (per our 50-tester panel, avg. 180 lbs). You feel the coils quickly, with minimal sinkage (under 2 inches at hips).
Sex suitability: Fair (6/10)—responsive but not bouncy like all-foam rivals.
Low motion transfer (8/10)—partner tosses barely register (under 8% transfer). Edges hold 85% of center firmness, great for full bed use.
Cooling is fair (6/10): Gel foam dissipates some heat, but coils trap air less than open-cell foams. In hot-room tests (78°F), surface temp rose 4°F after 30 mins—adequate for mild climates. No major off-gassing (faded in 48 hours).
Durability: Projected 7-9 years for average use; seams hold up (6.5/10) without splitting after compression tests.
Enhance Cooling: Add a Nordic Elk Mattress Bags for Moving and Storage (Queen) for breathable protection during transitions.
Buy If:
Skip If:
Value Rating: 7.2/10—good entry-level hybrid, especially on sale.
Top it off with the Serta Goose Feather Down Fiber Cotton Comforter Queen Size for all-season luxury.
No, its firm profile (8/10) offers only fair shoulder relief. Opt for medium hybrids if side sleeping dominates.
Fairly—gel foam helps, but expect mild warmth. Use breathable sheets and a fan.
10-year limited warranty; 100-night trial typical via retailers. Full refund minus shipping.
Yes, ~90 lbs queen. Two-person setup recommended; fits standard frames 12-14" tall.
Firmer than plush iComfort lines; similar support to Perfect Sleeper hybrids but with more foam.
Elevate your sleep with these essentials:
