Our verdict: the RELX 4D is a well-liked chair, with 4.5 stars from 473 ratings and only 4% at 1 star. It has a sensible 3-year warranty and a long feature list. Its weak spot is the listing itself: the user height range appears only in a product image, and the text contradicts itself on the track length. Here's what checks out, what doesn't, and who should buy it.
The RELX 4D and Two Alternatives
Why it's worth a look: it packs an SL track, 32 airbags, foot rollers, heat at the lower back and calves, a yoga-style stretch and voice control into one chair rated for 330 lb. Owners praise its comfort most (246 mentions). It comes in cream, white, brown and black.
Why it's the main alternative: it has the same warranty structure as the RELX (3 years, with free repair in year 1). It states its fit (5'2" to 6'2") in the listing text and arrives with no assembly, while the RELX needs assembling. The trade-off is a lower 250 lb limit.
RELX 4D Scorecard
| Area | Verdict | Why |
|---|---|---|
| Features | Strong | SL track, 32 airbags with 5 pressure levels, foot rollers, lower back and calf heat, stretch, voice control, Bluetooth |
| Owner satisfaction | Strong | 4.5 stars, 72% five-star, 4% one-star |
| Warranty | Good | 3 years: free repair in year 1, parts only in years 2–3; shipping not covered |
| Capacity | Good | 330 lb maximum |
| Fit information | Fair | 4.9–6.2 ft, but only in a product image, not the listing text |
| Listing accuracy | Weak | Conflicting track length and a seat height figure that can't be right |
| Setup | Mixed | Assembly required; owners call it easy, but the listing says tools may be needed |
What the RELX 4D Offers
RELX 4D Massage Chair Full Body Zero Gravity Recliner, SL-Track
According to the Amazon listing, the RELX 4D runs its rollers on an SL track from the neck to the thighs. It detects your shoulder position and adjusts the massage position and back width. It offers 15 auto modes, 5 manual modes and 32 airbag massage points with 5 pressure levels, including airbags on the legs.
Foot rollers knead from toes to heels, far infrared heat warms the lower back and calves, and the backrest adds a yoga-style stretch for the lower back. You can start programs by voice, and a Bluetooth speaker plays music.
The chair weighs about 192 lb. Its dimension image shows about 60 inches deep upright (66 reclined), 30 inches wide and 44.5 inches high, with a 20-inch seat width. The same image says it's intended for users from 4.9 to 6.2 feet tall and up to 330 lb. Measure your room with our massage chair dimensions guide before you order, because the depth grows when it reclines.
Key Features
- SL track, neck to thighs: shoulder detection sets position and width.
- 32 airbags, 5 pressure levels: including the legs.
- Foot rollers: toes to heels.
- Far infrared heat: lower back and calves.
- Yoga-style stretch + voice control: plus a Bluetooth speaker.
What Buyers Say
Comfort leads the reviews, followed by value and the massage itself; recline and adjustability are mixed. These ratings are shared across RELX's listings, as we explain below.
Pros
- 330 lb capacity
- 32 airbags
- Calf heat + foot rollers
- 3-year warranty, year-1 free repair
Cons
- Assembly required
- Fit range only in an image
- Conflicting listing specs
Best for Heavier users who want full airbag coverage.
Skip if You want a chair that arrives assembled.
What Owners Say
Amazon's review summary describes the chair as highly recommended, good value, and helpful for back and waist pain. Here's how the eight review topics break down:
- Mostly positive: comfort (246 mentions), value for money (110), massage (86), relaxation (50), features (46) and assembly (39).
- Mixed: recline (39) and adjustability (34).
- On fit: one 5-foot owner says the chair adjusts easily to their height. A 5'10", 170 lb owner believes it could fit someone taller and heavier. Both fall inside the 4.9–6.2 ft range shown in RELX's dimension image.
One caution: those 473 ratings are shared across six Amazon listings, the four colors of the current 4D plus an older "with Body Scan" model. So they describe the RELX line in general, not one exact version.
Listing Claims That Don't Add Up
- Track length: the title and feature list say 55-inch SL track, but the product description says 53-inch, with "5 massage techniques and 2 deep modes." Assume the shorter figure until RELX clarifies.
- Seat height: the spec table lists a 37.75-inch seat height, which isn't realistic for a seat and is probably a data-entry error. Don't rely on it.
- "4D": the listing uses the 4D label but doesn't explain what the fourth dimension is. Our 2D vs 3D vs 4D guide explains what the term usually means.
- "95% of a real human massage": a marketing claim with no published test behind it.
- User height: the 4.9–6.2 ft range appears only in a dimension image, not in the written listing. If you're near either end, ask RELX to confirm, or see our chairs for tall people.
The Warranty in Plain English
RELX's warranty page sets out a 3-year limited warranty from the date of purchase:
- Year 1: free repair Maintenance and repair of defects in workmanship or materials, at no cost to you.
- Years 2 and 3: parts only RELX covers the parts, but not the labor.
- Never covered Shipping costs, damage from mishandling, improper installation or unauthorized repairs, power surges, and normal wear and tear of the upholstery.
- Returns from RELX's own store RELX's refund policy allows returns within 30 days, minus a flat return fee, and you must disassemble and repack the chair. If you buy on Amazon, the return terms shown at checkout apply instead.
RELX lists a US phone line and email for support, and the Amazon listing promises 24/7 customer service. The FTC advises checking who pays labor and shipping on warranty repairs; with RELX, after year 1 you'll pay labor, and shipping is never covered.
RELX 4D vs the Alternatives
| RELX 4D | KoziSense A18 | FURNIMAT 3D | |
|---|---|---|---|
| Rating | 4.5 (473, shared) | 4.6 (365) | 4.4 (67) |
| Stated user height | 4.9–6.2 ft (product image) | 5'2"–6'2" | 4'11"–6'2" |
| Max weight | 330 lb | 250 lb | 330–350 lb |
| Heat | Lower back, calves | Back, chest, calves | Waist and legs |
| Setup | Assembly required | No assembly | No assembly |
| Warranty | 3 yr (year 1 free repair) | 3 yr limited (year 1 free repair) | 3 yr |
Choose the RELX if you're a heavier user who wants calf heat and lots of airbag coverage. Choose the KoziSense A18 if you want no assembly and the best owner rating of the three. The FURNIMAT 3D matches the RELX's 330 lb rating (one spec says 350 lb) with a stated 4'11"–6'2" fit, but it has far fewer ratings.
Buy the RELX 4D if
- You weigh up to 330 lb and want room to spare
- You want calf heat, foot rollers and lots of airbags
- You're comfortable assembling a 192 lb chair with help
- A 3-year warranty with year-1 free repair suits you
Skip it if
- You're near the ends of its 4.9–6.2 ft range and need a confirmed fit
- You want a chair that arrives fully assembled
- You expect free labor on repairs after the first year
- You need exact specs you can trust from the listing
The Two Alternatives, Up Close
If the RELX's assembly or unconfirmed fit gives you pause, these are the two chairs we'd look at instead.
KoziSense A18: The Same Warranty, a Stated Fit
KoziSense A18 Zero Gravity Full Body Massage Chair with Heat
The A18 has the same warranty structure as the RELX: 3 years, with free repair in year 1. Unlike the RELX, it states its fit, 5'2" to 6'2", in the listing text, and it arrives with no assembly. A body scan sets its 3D rollers on an SL track, and it has voice control and heat at the back, chest and calves.
The trade-off is a lower limit: Amazon lists 250 lb, against the RELX's 330 lb. It holds 4.6 stars from 365 ratings, the best of the three, with comfort praised most. See our full A18 review.
Key Features
- Stated fit: 5'2" to 6'2" in the listing text.
- Arrives assembled: no tools, no helper needed.
- Body scan + 3D SL track: with voice control.
- Back, chest and calf heat: three warm zones.
- 3-year warranty: free repair in year 1.
What Buyers Say
Owners lead with comfort, value and the range of massage options. Heat and sizing are mixed.
Pros
- Best rating of the three
- No assembly
- Fit stated in writing
- Year-1 free repair
Cons
- 250 lb limit
- Mild heat
- Sizing reviews are mixed
Best for Buyers under 250 lb who want a sure fit.
Skip if You need the RELX's 330 lb capacity.
FURNIMAT 3D: RELX-Level Capacity, Fewer Reviews
FURNIMAT 3D Full Body Massage Chair, Zero Gravity SL-Track
The FURNIMAT 3D matches the RELX on capacity: its listing gives 330 lb in a product image and 350 lb in its specs. It states a 4'11" to 6'2" fit, arrives in one box with no assembly, and runs 3D rollers on a 55-inch SL track with a body scan, 6 techniques and a spot or zone lock.
It warms the waist and legs, has twin rollers for each foot and comes with a 3-year warranty. The catch is evidence: 4.4 stars from just 67 ratings. Our FURNIMAT review covers it in depth.
Key Features
- 330-350 lb capacity: listed two ways.
- 4'11" to 6'2" fit: the widest stated range here.
- No assembly: one box.
- 55-inch SL track + body scan: 6 techniques, spot lock.
- Waist and leg heat: 3-year warranty.
What Buyers Say
Owners praise its back and neck support and call it worth the price; ease of use is mixed, and the review base is small.
Pros
- Capacity on par with the RELX
- Widest stated fit
- No assembly
- 3-year warranty
Cons
- Only 67 ratings
- Capacity listed two ways
- Controls take learning
Best for Heavier users who'd rather skip assembly.
Skip if You want a long owner track record.
RELX Massage Chair FAQ
Is RELX a good massage chair brand?
Owners rate its 4D chair well: 4.5 stars from 473 ratings, with only 4% at 1 star. RELX offers a 3-year limited warranty with free repair in the first year. Its Amazon listing is less precise than it should be, so confirm fit and specs before buying.
What is the RELX massage chair warranty?
Three years from purchase. Year 1 covers free repair of defects; years 2 and 3 cover parts but not labor. Shipping costs and normal upholstery wear aren't covered.
How much weight can the RELX 4D hold?
Amazon lists a 330 lb maximum weight for every color of the RELX 4D.
Does the RELX 4D need assembly?
Yes. The listing says assembly is required and some tools may be needed. Owners generally describe assembly as easy, but the chair weighs about 192 lb, so plan on a helper.
How tall can you be to use the RELX 4D?
RELX's dimension image says it's intended for users from 4.9 to 6.2 feet tall (about 4'11" to 6'2"). That range isn't repeated in the written listing, so confirm with RELX if you're near either end.
Is the RELX track 53 or 55 inches?
The listing says both: 55 inches in the title and features, 53 inches in the description. We'd assume the shorter figure until RELX corrects it.
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