Sihoo B100-PRO Ergonomic Office Chair with 4D Linkage Armrests & Retractable Footrest

Concealed Retractable Footrest: Easily pull out the footrest and flip the buckle to deploy a 14.0" (35.5 cm) support pad featuring a 10.6" (27 cm) extension range, a maximum extension of 17.3" (44 cm), and a 145° rotation angle for ultimate leg relaxation.

4D Linkage Armrests: Featuring a premium PVC leather surface, these highly versatile armrests support a 70° vertical flip adjustment, 1.77" (4.5 cm) of front-to-back sliding, and a full 360° horizontal inner/outer rotation.

Advanced Wave-Pattern Mesh: The non-toxic, rot-resistant mesh fabric promotes continuous airflow while offering superior tensile strength and resilience for a long service life.

Multi-Dimensional Headrest: Crafted from durable PP material, the headrest offers 11 distinct height adjustment positions over a 3.9" (10 cm) range, combined with a 45° headrest rotation and a 20° bracket rotation.

Heavy-Duty Recline Mechanism: Outfitted with a thickened steel explosion-proof mechanism and cold-rolled tension spring, offering adjustable recline tension and a 3-position lock securing the backrest at 113°, 123°, or a maximum 133° angle.

Adaptive Lumbar Support: Features an intelligent front and rear tension adjustment system built into the PP lumbar frame to dynamically conform to your lower back.

Commercial-Grade Base & Lift: Verified by SGS and US BIFMA testing, it features a Class 4 steel gas lift and a 27.6" (70 cm) knockdown steel base that successfully passed a rigorous 2,504.4 lbs (1136 kg) static pressure test. Smooth 2.36" (6 cm) PU casters protect your floors from scratches.

Package Size: 21.7" × 15.4" × 22.8" (55 × 39 × 58 cm) | Weight: Net 39.1 lbs (17.75 kg) / Gross 42.4 lbs (19.25 kg)

Materials: Wave-pattern premium mesh, PP and fiber (headrest, back frame, seat shell, and lumbar pillow), PVC leather armrest surfaces, heavy-duty steel mechanism, knockdown steel base, and PU casters.

Care Instructions: Engineered for a single occupant with a maximum weight capacity of 265 lbs (120 kg). Always position the chair on a flat, level surface. Keep hands clear of the base mechanism during adjustments to prevent pinching injuries. Do not sit on the armrests, stand on the chair, or use it as a step stool or pushcart. Keep away from sharp objects and open flames.

Retail & Enterprise Pitching: When presenting this "PRO" model to wholesale buyers, emphasize its flawless ANSI/BIFMA X5.1-2017 (R2022) testing record. Highlight the severe rear stability test (stacked with 286.6 lbs / 130 kg of weights) and the 120,000-cycle backrest and lumbar durability tests to prove its commercial-grade resilience.

Visual Focus for E-commerce: For your Shopify product page, utilize videos or GIFs to demonstrate the impressive 360° horizontal rotation and 70° flip-up capability of the 4D armrests, alongside the deployment of the concealed footrest. These dynamic features are massive conversion drivers for premium seating.

Target Audience Messaging: Position the B100-PRO as the ultimate executive hybrid chair. The combination of the deep 133° recline, retractable footrest, and highly adjustable 4D armrests makes it the perfect solution for users who spend extended hours working, gaming, and resting in the same space.