ThunderX3 Flex Pro Loft Ergonomic Dark Gray Office Chair

FLEX Pro

The FLEX Pro is designed to adapt to your every move with fully self-adjusting support for your headrest, backrest, and lumbar region. Its SYNC6 mechanism provides six levels of adjustment, including synchronous and forward seat tilt, allowing you to maintain ergonomic posture throughout the day. The innovative 360° 5D armrests along with 19 dimensions of total adjustability give you control over every seating position, creating a perfectly personalized experience for both work and play​.

SYNC6 MULTI-FUNCTIONAL MECHANISM

SIX LEVELS OF FINE-TUNED COMFORT

Adjust your chair to fit your unique body shape, size, and posture. FLEX Pro is built with SYNC6, a multi-functional mechanism that allows for 6-way adjustability. FLEX Pro is one of the first chairs with both Synchronous Tilt and Forward Seat Tilt mechanisms simultaneously built in.

SYNCHRONOUS TILT

STRETCH YOUR BODY NATURALLY

We prioritize user comfort, so you can simply lean back and relax while experiencing the benefits of our innovative design. Synchronous tilt allows the backrest and seat to move together at the optimal ratio, providing ergonomic support for your entire body.

8D FULLY SELF-ADJUSTING HEADREST, BACKREST, AND LUMBAR SUPPORT

ULTIMATE COMFORT IN 8 DIMENSIONS

Keep your upper body supported in every imaginable position so you never feel stiff or cramped after long periods of sitting.

2D SELF-ADJUSTING HEADREST

HEAD SUPPORT THAT ADAPTS

The headrest cradles the back of your head while self-adjusting naturally to your movement.​

3D SELF-ADJUSTING BACKREST

FLEXIBLE BACK RELIEF

Along with FLEX Pro’s synchronous tilt, its backrest automatically angles backwards to accommodate any posture you like, while also coming with adjustable tilt tension and position lock.

3D SELF-ADJUSTING LUMBAR SUPPORT

INNOVATIVE MAGIC FOR YOUR LOWER BACK

The unique lumbar support is split into two self-adjusting sections to cradle opposite sides of your spine, paying close attention to your lower back muscles. They can be lockeded at a specific depth for constant support or allowed to self-adjust to your seating position.​

LOFT FABRIC

UNMATCHED COMFORT AND SOFTNESS

Experience ultimate relaxation with a material that’s as gentle on your skin as it is cozy.

19D ADJUSTABILITY

PRECISE FIT, FOR A SNUG SIT

Experience the ultimate six in adjustability with SYNC6 technology – Height, Depth, Angle, Resistance, and Synchronous and Forward Tilt. Choose from dozens of seating configurations to find the setting that fits you just right. It’s in the name — with 19 dimensions of adjustability, FLEX Pro truly is the most flexible, ergonomic chair out there.

5D 360° ARMREST

UNMATCHED FREEDOM FOR YOUR ARMS

Now you can experience an innovative armrest that can match the exact position and angle of your arms. It adjusts up & down, front & back, tilts, and even rotates a full 360° so you never have to worry about awkward upper body positioning ever again.​

RETRACTABLE ARMRESTS

Lean into your work with ease

LATERAL ELBOW SUPPORT

Armrests that cover your every move.

5D FLIP-UP

Perfect for mobile & console gaming

4D ADJUSTABILITY HEADREST

NO MORE STIFF NECKS

The headrest height can be manually adjusted to match your body while its depth automatically adapts to pressure when you lean back or forward.

ADJUSTABLE BACKREST HEIGHT

STRAIGHTFORWARD ADJUSTMENT

Simply pull upwards on the Y-frame backrest to lengthen it according to your size.

FORWARD SEAT TILT

LEAN IN EFFORTLESSLY

Forward seat tilt lets your lower body stay free and open, even when you’re leaning into your tasks at hand. Tilt the seat at an incline using the simple lever to enjoy a healthy posture and improved circulation.

ADJUSTABLE SEAT DEPTH

GET CLOSER TO THE ACTION

Achieve optimal posture and alleviate pressure on your back and legs with our adjustable seat depth feature. Experience better health and well well-being with maximum ergonomic benefits.

CRAFTED WITH ATTENTION TO DETAIL

FEEL GOOD, LOOK GOOD

Our design boasts a robust Y-shaped structure that delivers a one one-two punch. It offers sturdy and even support for every body type and adds a classy, premium support for every body type and adds a classy, premium look to every space. Show off your style with FLEX Pro.

STURDY AND RELIABLE

Our Class 4 gas lift, certified by BIFMA X5.1, supports up to 331 lbs and is engineered to last through over 100,000 cycles, ensuring unparalleled strength and longevity while you sit comfortably.