Sihoo's Prime Day Chair Deals Will Have You Kicking Back in Prime Comfort

Gizmodo

08-07-2025

Here are two great Prime Day deals that have your back — quite literally. Two of Sihoo's best, most ergonomically correct, and most comfortable chairs are on sale during this Prime Day. The Sihoo M18 Classic Office Chair is just $120 for the black model or $130 for white, green, or blue when you use the code M18CDL at checkout, and the Sihoo Doro C300 Pro Ergonomic Chair is marked down to just $350 for the black model or $360 for the white version when you use the code Gizmodo at checkout.
It's become an accepted medical fact that long periods of sitting can be detrimental to your health, and that gets compounded when you're spending long hours in an uncomfortable chair that's devoid of any ergonomic design. We can't change the number of hours you spend at a desk, but we can make the effort to spend them in a chair that's designed with your comfort and your body in mind.
See M18 at Sihoo.com
See Doro C300 Pro at Sihoo.com
Sihoo's ergonomic chairs are designed to eliminate sitting pain and give you a state-of-the-art level of ergonomic comfort without destroying your budget. There are other ergonomic office chairs on the market that can help your posture and give you a comfortable day at the desk, but they can also run well over $1,000 in price. Sihoo's chairs remain exceptionally well-priced even as they use top-line durable materials that will last for years, attractive modern designs, and advanced ergonomic technology. Those already competitive prices are coming down for Prime Day, so now's your chance to get acquainted with Sihoo, the world's leading ergonomic chair brand with over 2.6 million products sold per year in 146 countries.
Sihoo's Doro Series are their premium ergonomic chairs, created to enhance your comfort and support your back with advanced lumbar support. They're designed for users ranging in height from 5 feet to 6-foot-3 and up to 300 pounds, so they're almost universally compatible. The Doro C300 Pro has amazing weight-sensing technology that automatically adapts to the size and weight of the user to provide a balanced reclining experience.
The Doro C300 Pro is exceptionally adjustable for body size and comfort preferences, with a spacious W-shaped cushion that can be adjusted for seat depth, 6D adjustable armrests that can be moved in six directions depending on what suits you best, and a flexible backrest that uses Sihoo's BM (Body Movement) Tracking System to automatically conform to your spine to keep you supported as you shift positions and postures throughout the day.
The headrest of the Doro C300 Pro is equally adjustable, able to move up and down, back and forth, and rotate for peak neck comfort. All told, the advanced features of the Doro C300 Pro will afford you hours of comfortable seating for work, studying, or gaming.
The Doro C300 Pro is made with a breathable mesh that is stretchy yet durable, soft yet supportive, and skin-friendly. It's easy to clean and maintain, and the look of the Doro C300 Pro in either black or white is elegant and complements whatever room you place it in.
During this Prime Day sale, the Doro C300 Pro is just $350 for the black model or $360 for the white model when you use the code Gizmodo at checkout.
The basic office chair is usually the one that does the worst damage to your back and causes you to tire out the fastest, but the M18 Classic Office Chair brings you all of the ergonomic advantages and pure comfort that Sihoo is known for while occupying the most accommodating rung on their price ladder. With an extra discount for Prime Day, the M18 Classic is just $120 in black or $130 in white, green, or blue with the code M18CDL.
The M18 Classic has dual lumbar support, able to adjust vertically and horizontally to achieve the position that best supports your back. Its maximum load of 330 pounds is larger even than the Doro C300 Pro, and its backrest is made of the same breathable mesh, while the seat has a plush, comfortable W-shaped sponge cushion to make those long-grind days and nights far more tolerable.
The customization options on the M18 Classic Office Chair include a multi-directional headrest that moves up to 4 inches up and down and pivots 45 degrees side to side for maximum neck comfort and support. The recline angle goes back to 126 degrees for lean-back work or a quick relaxing breather, and the armrests can be adjusted up and down depending on your taste. Like the Doro C300 Pro, the M18 Classic has a sturdy steel and aluminum frame and comes with a 3-year warranty from Sihoo.
Just because you work or study for long hours, or because your gaming sessions approach marathon levels, does not mean you have to trash your back and live in discomfort or worse. An ergonomically designed, durable, customizable, and ultra-comfortable chair from Sihoo is your way to alleviate the effects of long hours spent seated, and Sihoo's Prime Day sale is your chance to upgrade your home office or gaming setup with one of their award-winning ergonomic chairs. Other Sihoo ergonomic chairs are also on sale, so feel free to explore the full collection in the Sihoo store.
See M18 at Sihoo.com
See Doro C300 Pro at Sihoo.com