This $160 office chair deal with adaptive lumbar support is easily the best budget upgrade I've seen ahead of Prime Day — and it's cheaper now than it was in the Spring sale

I've been keeping a close eye on office chair deals in the run-up to Prime Day, and this one is the best budget pick you get right now, with the Sihoo B100 dropping to $160 (was $220) at Amazon.

This mesh office chair has way more features than it has any right to, considering the price, notably adaptive lumbar support that provides consistent posture support even as you shift in your seat. And the discount price is even cheaper than it was during Amazon's Spring sale in March, where it fell to $180.

Considering most office chairs I see at this price point lack any true lumbar support - essential for all-day comfort - this has rocketed to the top of my list of must-buy office furniture ahead of Prime Day.

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Today's top Sihoo office chair deal

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Sihoo B100 office chair: was $219.99 now $159.99 at Amazon

For my money, the B100 is the best budget office chair in the sales right now - and that's chiefly down to the adaptive lumbar support. You don't often get this on cheap seats, but it moves with your posture to consistently reduce lower back strain while at work. A breathable mesh back, wide seat cushion, flip-up armrests, and adjustable recline angles round out the feature-set for all-day comfort.

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While my team and I haven't reviewed the B100, we have tested a wide range of Sihoo's office chairs, and they've always proved comfortable, adjustable, and well worth the relatively low asking price.

So, based on our experience with the brand, and the broad feature-set here, well-designed for providing all-day comfort for the eight-hour work day, there's no doubt in my mind that this ergonomic chair is the best budget pick in the early Prime Day sales right now.

Sihoo's B100 boasts a widened seat cushion, which more evenly spreads your weight across hips and thighs, flip-up armrests, and an accommodating, height-adjustable headrest.

Elsewhere, you'll find seat height control, three reclining positions at 110°, 125°, and 135°, with support for up to 300lb weight.

But it's that adaptive lumbar support - sometimes called dynamic lumbar support - that really seals the deal for me here. It's effectively self-adjusting, so when you shift your weight or position, it continues to provide support.

In the office chair world, you can expect to pay at least double the asking price for a seat with adaptive lumbar support - the excellent FlexiSpot C7 is one of the cheapest examples we've tested, and that's priced around the $350-mark. So, for $160 office chair like the Sihoo B100 to offer it is an exceptionally good deal.

For more top picks, check out my guide to the best office chairs.

Also consider: More Sihoo office chair deals

Save $60

Sihoo Doro C300 Ergonomic Office Chair: was $349.99 now $289.99 at Amazon

If you have the budget, the Doro C300 is an exceptional office chair with more adjustability than the B100. We tested this one and found it very breathable and comfortable for all-day sitting in our review.

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Sihoo M57 Ergonomic Mesh Office Chair: was $239.88 now $189.97 at Amazon

There's a lot I like about Sihoo's M57, including the adjustable lower back support, 3D armrests, and 330lb weight limit. However, it's more expensive than the B100 right now, and there's no adaptive lumbar cushioning here, so I'd 100% opt for the B100 for improved comfort.

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Save $23

Sihoo M18 Ergonomic Office Chair: was $169.99 now $146.99 at Amazon

The M18 from Sihoo is a solid budget office chair that typically hovers around this price anyway. It's nicely designed, has all the core features. But I'd still recommend the B100 over this one due to the better lumbar support. For the sake of less than $15, it's worth the extra.

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