HBADA E3 Air vs SIHOO M57: Which Should You Buy?

Key difference: The M57 lists about $180 lower, but the E3 Air has automatic lumbar support.

HBADA and SIHOO each publish their own specifications, and this comparison of the E3 Air and M57 uses only those, plus regular US list prices.

Why compare them

Why put the HBADA E3 Air next to the SIHOO M57? The HBADA E3 Air and the SIHOO M57 are mesh chairs with a headrest from two brands that sell direct, and the M57 is the lower-priced of the two, so the question is what the E3 Air adds for the extra money.

Specs side by side

Strengths and weaknesses

HBADA E3 Air

Strengths

• Automatic lumbar support ("3-Zone Floating Wing Lumbar Support System: height 5 cm (6 levels), forward/backward 3 cm (4 levels), 40° side-wing rotation (3 levels), 12° spring-based adaptive support"), where the M57's is set by hand.
• Seat depth adjusts over ≈16.9–18.9 in (43–48 cm), while the M57 lists a single depth.
• Deeper recline: up to 140° against 126° on the M57.
• Longer warranty: 5 years on the base, gas lift and casters; 3 years on other parts, against 3 years on the M57.
• A Footrest Version is sold; none is listed for the M57.

Good to know

• Compare the list prices first: it starts at $499, against $319.99 for the M57.

SIHOO M57

Strengths

• Lower list price: from $319.99 against $499 for the E3 Air.

Good to know

• Plan a minute to set the lumbar by hand ("Dual-adjustable lumbar support (vertical and horizontal)"); the E3 Air's moves on its own.
• Check the single listed seat depth (18.11 in (≈46 cm)) against your thigh length; the E3 Air's adjusts.
• If you lean far back, note it reclines up to 126°, against 140° on the E3 Air.
• Read the warranty terms: 3 years, against 5 years on the base, gas lift and casters; 3 years on other parts on the E3 Air.
• If you want a built-in footrest, look at the E3 Air; no footrest version is listed for the M57.

How they differ

Price. At regular US list prices the HBADA E3 Air is $499–$549 and the SIHOO M57 is $319.99. The M57 lists about $180 below the E3 Air, before any store sale. Price options: the E3 Air — E3 Air 2026 Edition, Black or Gray: Without Footrest $499, With Footrest $549; the M57 — Black, Gray and White $319.99.

Lumbar support. The HBADA E3 Air lists “3-Zone Floating Wing Lumbar Support System: height 5 cm (6 levels), forward/backward 3 cm (4 levels), 40° side-wing rotation (3 levels), 12° spring-based adaptive support”, the SIHOO M57 “Dual-adjustable lumbar support (vertical and horizontal)”. The E3 Air's lumbar moves on its own as you shift, while the M57's is positioned by hand.

Seat depth. The HBADA E3 Air lists “≈16.9–18.9 in (43–48 cm)”, the SIHOO M57 “18.11 in (≈46 cm)”. On the E3 Air you can move the seat pan to suit your thigh length; the M57 gives one depth only.

Recline. The HBADA E3 Air lists “Up to 140°; 5 tilt levels”, the SIHOO M57 “Up to 126°”. The E3 Air leans back further than the M57.

Warranty. The HBADA E3 Air lists “5 years on the base, gas lift and casters; 3 years on other parts”, the SIHOO M57 “3 years”. The E3 Air's cover runs longer than the M57's.

Footrest. HBADA sells a Footrest Version of the E3 Air; no such version is listed for the M57.

Seat size. Seat height: the HBADA E3 Air lists “≈18.3–21.7 in (46.5–55 cm)”, the SIHOO M57 “≈18.1–21.7 in (46–55 cm)”. Seat width: the HBADA E3 Air lists “≈20.3 in (51.5 cm)”, the SIHOO M57 “≈20.1 in (51 cm)”.

Other details. For the E3 Air and M57, the table above gives the armrests, headrest, maximum load and chair weight in each brand's own wording.

Who should buy which

• Pick the E3 Air over the M57 if you want lumbar support that adjusts itself as you move, with nothing to set.
• Pick the E3 Air over the M57 if you want a seat you can slide forward or back, over a ≈16.9–18.9 in (43–48 cm) range.
• Pick the E3 Air over the M57 if you want a deeper recline (up to 140°).
• Pick the M57 over the E3 Air if you want the lower price — the M57 lists about $180 below the E3 Air.

Not published by the brand (E3 Air vs M57): chair weight for the HBADA E3 Air.

Sources

• HBADA E3 Air (compared here with the M57): HBADA E3 Air Ergonomic Office Chair 2026 Edition – HBADA EU official store; HBADA E3 Air Ergonomic Office Chair 2026 Edition – HBADA US official store, checked 2026-10-09; US list price from HBADA US Official Store, checked 2026-10-09.
• SIHOO M57 (compared here with the E3 Air): Sihoo M57 Netz Bürostuhl – DE Sihoo Offizieller Shop; SIHOO M57 Ergonomic Mesh Office Chair – Official US Sihoo Store, checked 2026-10-09; US list price from SIHOO US Official Store, checked 2026-10-09.
• Figures marked ≈ for the E3 Air and M57 are Chairpedia's unit conversions, not brand figures.