HBADA E3 Air vs SIHOO M59AS: Which Should You Buy?

Key difference: The E3 Air has an adjustable seat depth, but the M59AS lists about $50 lower.

HBADA and SIHOO each publish their own specifications, and this comparison of the E3 Air and M59AS uses only those, plus regular US list prices.

Why compare them

Why put the HBADA E3 Air next to the SIHOO M59AS? The HBADA E3 Air and SIHOO M59AS are mid-priced mesh chairs from two direct-to-consumer brands that sell through their own stores.

Specs side by side

Strengths and weaknesses

HBADA E3 Air

Strengths

• Seat depth adjusts over ≈16.9–18.9 in (43–48 cm), while the M59AS lists a single depth.
• Deeper recline: up to 140° against 126° on the M59AS.
• Longer warranty: 5 years on the base, gas lift and casters; 3 years on other parts, against 3 years on the M59AS.
• Lumbar adapts on its own and can also be set by hand ("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"), unlike the M59AS.
• A Footrest Version is sold; none is listed for the M59AS.

Weaknesses

• Costs more: from $499 against $449.99 for the M59AS.

SIHOO M59AS

Strengths

• Lower list price: from $449.99 against $499 for the E3 Air.

Weaknesses

• Only one seat depth is listed (17.13 in (≈43.5 cm)), while the E3 Air's adjusts.
• Shallower recline: up to 126° against 140° on the E3 Air.
• Shorter warranty: 3 years, against 5 years on the base, gas lift and casters; 3 years on other parts on the E3 Air.
• Lumbar works automatically with no manual setting listed ("Dynamic lumbar support in a dual-section backrest"), unlike the E3 Air.
• No footrest version is listed for the M59AS, unlike the E3 Air.

How they differ

Seat depth. The HBADA E3 Air lists “≈16.9–18.9 in (43–48 cm)”, the SIHOO M59AS “17.13 in (≈43.5 cm)”. On the E3 Air you can move the seat pan to suit your thigh length; the M59AS gives one depth only.

Recline. The HBADA E3 Air lists “Up to 140°; 5 tilt levels”, the SIHOO M59AS “Up to 126°”. The E3 Air leans back further.

Warranty. The HBADA E3 Air lists “5 years on the base, gas lift and casters; 3 years on other parts”, the SIHOO M59AS “3 years”. The E3 Air's cover runs longer.

Price. At regular US list prices the HBADA E3 Air is $499–$549 and the SIHOO M59AS is $449.99. The M59AS lists about $50 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 M59AS — Black and White $449.99.

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 M59AS “Dynamic lumbar support in a dual-section backrest”. The E3 Air's lumbar adjusts in more ways than the M59AS's.

Footrest. HBADA sells a Footrest Version of the E3 Air; no such version is listed for the M59AS.

Seat size. Seat height: the HBADA E3 Air lists “≈18.3–21.7 in (46.5–55 cm)”, the SIHOO M59AS “18.31–22.24 in (46.5–56.5 cm)”. Seat width: the HBADA E3 Air lists “≈20.3 in (51.5 cm)”, the SIHOO M59AS “19.88 in (50.5 cm)”.

Other details. For the E3 Air and M59AS, 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 M59AS 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 M59AS if you want a deeper recline (up to 140°).
• Pick the E3 Air over the M59AS if you want a longer warranty (5 years on the base, gas lift and casters; 3 years on other parts).
• Pick the M59AS over the E3 Air if you want the lower price — the M59AS lists about $50 below the E3 Air.
• Pick the M59AS over the E3 Air if you want a seat that rises higher: 18.31–22.24 in (46.5–56.5 cm).

Not published by the brand (E3 Air vs M59AS): chair weight for the HBADA E3 Air.

Sources

• HBADA E3 Air (compared here with the M59AS): 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 M59AS (compared here with the E3 Air): Sihoo M59AS Ergonomic Chair | Dual-Section Back & Flip-Up Armrests – UK Sihoo official Shop; Sihoo M59AS Ergonomic Office Chair with Dual-Section Backrest – 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 M59AS are Chairpedia's unit conversions, not brand figures.