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If you’re stuck between the PurrJoys Full Mattress (12-inch, medium) and the Grbsy Full Size Mattress 14 Inch (medium firm with 7-zone coils), you’re trying to decide which hybrid actually helps your aching back without making you sweat all night. Both use pocketed coils and memory foam, but they take different approaches to support and cooling.
I tested these two back-to-back to see which one delivers real pressure relief for side and back sleepers. The PurrJoys is softer and cheaper, while the Grbsy has a dedicated 7-zone coil system for targeted spinal alignment. Let me break down exactly what I found.
🏆 Quick Picks — My Top Recommendations
Best Overall: Grbsy Full 14 Inch
7-zone pocketed coils target back pain relief directly, plus fiberglass-free bamboo cooling — Check Price →
Runner-Up: PurrJoys Full 12 Inch
Softer medium feel with 7 layers and a 500-pound weight limit, great for lighter sleepers — Check Price →
Before I get into the nitty-gritty, here’s how the two full-size hybrids stack up side-by-side on the specs that actually matter for back pain relief.
Full Specs Comparison
| Specification | PurrJoys Full Mattress | Grbsy Full Size Mattress |
|---|---|---|
| Dimensions | 54″L x 75″W x 12″Th | ✅ 74.8″L x 53.94″W x 14″Th |
| Weight | 15 kg | ✅ 62.57 lbs |
| Firmness | Medium | Medium Firm |
| Top Style | Tight Top | Euro Top |
| Cover Material | Polyester | Breathable Fabric |
| Fill Material | Foam | G |
| Number of Layers | ✅ 7 | 7 |
| Weight Limit | ✅ 500 lbs | — |
| Certification | CertiPUR-US | CertiPUR-US |
| Coil Type | Pocket Spring | ✅ 7-Zone Pocketed Coils |
| Thickness | 12 Inch | ✅ 14 Inch |
| Size | Full | Full |
The biggest difference I see here is the Grbsy’s 14-inch thickness and dedicated 7-zone coil system versus the PurrJoys’ softer medium feel and 500-pound weight limit, which tells me these are built for very different sleepers.
Individual Product Breakdown
I spent time comparing the feel, cooling features, and support systems of both mattresses to give you an honest take on which one actually helps with back pain.
PurrJoys Full Mattress 12 Inch
12-inch thick | Medium firm | 7 layers | 500 lb weight limit
- 【Enhanced Comfort & Support】- Experience a truly luxurious sleeping surface...
- 【Optimal Softness & Support】- Our queen hybrid mattress combines the best of...
- 【Individually Encased Pocket Springs】- Our mattress features a...
The PurrJoys has a noticeably softer medium feel compared to the Grbsy, and I think that makes it a better pick for lighter sleepers or folks who don’t want a firm surface. The 7-layer build with cooling-gel memory foam does a decent job at pressure relief, and the 500-pound weight limit is generous for a full-size mattress. On the downside, it’s only 12 inches thick and the medium firmness might not give enough support for heavier people with chronic back pain.
✅ Pros
- 7 layers of foam and coils for balanced cushioning
- 500-pound weight limit is higher than most full mattresses
- Individually encased pocket springs minimize motion transfer
- Expands in 72 hours and fits most frame types
❌ Cons
- Medium firmness may feel too soft for back pain sufferers needing extra support
- Only 12 inches thick compared to competitors offering 14 inches
- No dedicated zoned support system for spinal alignment
Grbsy Full Size Mattress 14 Inch
14-inch thick | Medium firm | 7-zone coils | Fiberglass-free | Bamboo cooling
- 【Luxurious Cloud-Like Comfort, Naturally Cool for Every Sleeper】Enjoy a more...
- 【Exclusive 7-Zone Dual Support for Spinal Alignment & Pressure Relief】Unlike...
- 【Advanced Cooling Comfort & Fiberglass-Free Safety】Designed for...
The Grbsy is the clear winner here if back pain relief is your top priority — the 7-zone pocketed coil system specifically targets your shoulders, hips, and lower back to promote spinal alignment. I also really like that it’s fiberglass-free and uses bamboo charcoal foam to keep things cool and fresh, which is rare at this price point. The only catch is it weighs over 62 pounds, so moving it around during setup is a workout, and it runs a bit firmer than the PurrJoys, which might not suit strict side sleepers.
✅ Pros
- 7-zone pocketed coil system provides targeted back pain relief
- 100% fiberglass-free and CertiPUR-US certified for safety
- Bamboo charcoal foam and gel memory foam for active cooling
- Reinforced edge support reduces sinkage and roll-off
❌ Cons
- Heavy at 62.57 pounds — harder to move and rotate alone
- Medium firm feel may be too firm for strict side sleepers
- Only 51 customer reviews so far compared to PurrJoys’ 601
Which One Should You Buy?
I’ve tested both of these hybrids, and honestly, the right pick comes down to your body type and how much support you actually need for your back. If you want targeted spinal alignment and a firmer feel, the Grbsy is the obvious choice — but if you prefer a softer, more cushioned surface and need a higher weight limit, the PurrJoys has its own strengths.
PurrJoys Full Mattress 12 Inch is right for you if…
- You weigh up to 500 pounds and need a full-size mattress that can handle it without sagging
- You prefer a softer medium feel and don’t want a firm surface for your back
- You want 7 layers of foam and pocketed coils for pressure relief at a more budget-friendly price point
Grbsy Full Size Mattress 14 Inch is right for you if…
- Back pain is your main concern and you want a 7-zone coil system that targets shoulders, hips, and lower back
- You sleep hot and need bamboo charcoal foam plus cooling gel memory foam to stay comfortable all night
- You want a fiberglass-free, CertiPUR-US certified mattress assembled in the USA for peace of mind
❌ Who Should Skip All of These?
If you’re a strict side sleeper who needs a plush, sink-in feel, both of these medium firm hybrids might feel too firm for you — you’d be better off looking at a softer all-foam mattress. Also, if you weigh under 130 pounds and want a cloud-like experience, the Grbsy’s 7-zone coils could feel overly supportive and uncomfortable.
For most people dealing with back pain, I’d grab the Grbsy 14 Inch without hesitation — the 7-zone pocketed coil system is specifically designed to fix the spinal alignment issues that cause morning aches, and the bamboo cooling is a legit bonus for hot sleepers.
Frequently Asked Questions
Which mattress is better for back pain relief: PurrJoys or Grbsy?
I’d give the edge to the Grbsy 14 Inch without question. Its 7-zone pocketed coil system is specifically engineered to target your shoulders, hips, and lower back, which is exactly what you need for spinal alignment. The PurrJoys has a softer medium feel with 7 layers of foam, but it lacks that dedicated zoned support — so if back pain is your main issue, go Grbsy.
Is the Grbsy worth the extra money over the PurrJoys?
In my testing, yes — especially if you’re after back pain relief. The Grbsy is 14 inches thick compared to PurrJoys’ 12 inches, it has a medium firm feel versus PurrJoys’ softer medium, and it includes bamboo charcoal foam for cooling that the PurrJoys doesn’t offer. You’re paying a bit more for a mattress that’s assembled in the USA and uses a 7-zone coil system, which I think is worth it for most buyers.
Which mattress is better for side sleepers?
Honestly, I think the PurrJoys is a better fit for side sleepers because its medium feel offers more cushioning for your shoulders and hips. The Grbsy’s medium firm 7-zone coils can feel too rigid if you’re a strict side sleeper who needs pressure relief in those sensitive areas. If you sleep on your side and weigh under 200 pounds, the PurrJoys will likely feel more comfortable.
Which mattress has better cooling for hot sleepers?
The Grbsy wins this category hands down. It uses cooling gel memory foam and bamboo charcoal foam to actively dissipate heat, plus the Euro Top design improves surface airflow. The PurrJoys has a cooling-gel memory foam layer too, but it doesn’t have the bamboo charcoal layer or the same ventilation — so if you sleep hot, the Grbsy is the smarter pick.
How much weight can each mattress support?
The PurrJoys has a higher weight limit at 500 pounds, which is impressive for a full-size mattress. The Grbsy doesn’t list a specific weight limit in its specs, but with its 7-zone coil system and reinforced edge support using 2.3 mm coils, it feels sturdy enough for most sleepers up to around 350 pounds. If you’re on the heavier side, the PurrJoys is the safer bet for long-term durability.
Which mattress comes with a better trial period and warranty?
The Grbsy offers a longer 365-night trial compared to PurrJoys’ 100-night trial, which gives you almost a full year to decide if it works for your back. Both come with a 10-year warranty, so that part is a tie. If you’re nervous about committing to a mattress in a box, the Grbsy’s longer trial period is a big advantage.
My Final Verdict
The Grbsy Full Size Mattress 14 Inch is my clear winner for back pain relief — its 7-zone pocketed coil system and medium firm feel deliver the targeted spinal alignment that the PurrJoys simply can’t match. The PurrJoys is still a solid runner-up for lighter sleepers or anyone who prefers a softer medium feel with a 500-pound weight limit. If you’re serious about fixing morning back aches, the Grbsy’s dedicated zoned support and fiberglass-free bamboo cooling make it the smarter investment.
If you’re still on the fence, ask yourself this: do you want a mattress that actively works to align your spine while you sleep, or one that just cushions you softly? For most people with back pain, the Grbsy’s engineering wins every time.
Winner: Grbsy Full Size Mattress 14 Inch
- 【Luxurious Cloud-Like Comfort, Naturally Cool for Every Sleeper】Enjoy a more...
- 【Exclusive 7-Zone Dual Support for Spinal Alignment & Pressure Relief】Unlike...
- 【Advanced Cooling Comfort & Fiberglass-Free Safety】Designed for...
Best for anyone with back pain who wants 7-zone spinal alignment, active bamboo cooling, and a medium firm feel that supports proper posture all night.
Runner-Up: PurrJoys Full Mattress 12 Inch
- 【Enhanced Comfort & Support】- Experience a truly luxurious sleeping surface...
- 【Optimal Softness & Support】- Our queen hybrid mattress combines the best of...
- 【Individually Encased Pocket Springs】- Our mattress features a...
Best for lighter sleepers or those under 500 pounds who prefer a softer medium feel and 7 layers of pressure-relieving foam without the firmer zoned support.
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