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ProtoArc EC300 Ergonomic Office Chair
ProtoArc EC300 Ergonomic Office Chair, view 2ProtoArc EC300 Ergonomic Office Chair, view 3ProtoArc EC300 Ergonomic Office Chair, view 4ProtoArc EC300 Ergonomic Office Chair, view 5ProtoArc EC300 Ergonomic Office Chair, view 6
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EC300 Ergonomic Office Chair

$229.99$269.99Save 15%

Currently sold out at protoarc.com

The ProtoArc EC300 is an ergonomic office chair aimed at taller users, where the whole backrest, lumbar included, moves through 5 height positions as one unit. It adds a sliding seat, 3D headrest, four recline locks and a mesh back. Rated for 5'4" to 6'1" and up to 220 lb, it is $229.99 but was sold out at last check.

Shop now at ProtoArc →Code GFPALEKSANDRBODNAR

See all 110 ProtoArc products·Visit protoarc.com

Color
Black

Price and stock from protoarc.com, refreshed daily. We may earn a commission if you buy.

Highlights

  • Backrest and lumbar adjust together: 5 positions, 2.36 in. range
  • 5-position sliding seat with 1.97 in. travel
  • 3D headrest with height, depth, rotation and pivot
  • Recline locks at 90, 105, 120 and 130 degrees, plus tilt tension
  • Mesh back, 55D foam seat, SGS Class-4 gas lift, 2.36 in. silent casters

Best for

A taller home-office worker who wants full-back support that stays aligned.

Things to consider

  • Out of stock at last check.
  • Armrests are 2D (height only), less adjustable than the EC200 Pro's 4D arms.
  • 220 lb maximum and 6'1" upper height limit.

Key specs

Price$229.99
User height5'4" to 6'1"
Weight capacity90 to 220 lb
Seat depth travel1.97 in., 5 positions
Recline90, 105, 120, 130 degrees
Gas liftSGS Class-4
ColorBlack

Our take

A thoughtful chair for taller users, once it is back in stock.

EC300 Ergonomic Office Chair at a glance

BrandProtoArc
Price$229.99 (was $269.99)
TypeErgonomic Chairs
Options1 color
AvailabilitySold out at protoarc.com
CouponGFPALEKSANDRBODNAR
ReturnsReturns within 30 days of delivery get a full refund including original shipping and…

Price check

At $229.99, the EC300 Ergonomic Office Chair is toward the top of ProtoArc's price range, whose 110 listed products run $9.90 to $292.95.

It's currently 15% below its listed price of $269.99. Sale prices can end without notice, so check the live price before you order.

Similar items from other brands we track run $49.99 to $249.95.

Buying from ProtoArc

ProtoArc is a smart pick for desk workers who want ergonomic keyboards, mice or a mesh chair without paying premium-brand prices, and its 2-year accessory warranty and free US shipping over $19.99 lower the risk. Skip it if you need a deeply customizable mechanical keyboard or ship to Hawaii, Alaska or an APO address, where service is restricted. Check which layout and OS a keyboard is built for (several models are Mac-specific or UK layout) before you order.

Shipping
Continental US orders ship free over $19.99 with an estimated 3 to 5 business days. Canada is quoted at 5 to 7 business days, and the UK, Germany and select EU countries pay rates calculated at checkout.
Returns
Returns within 30 days of delivery get a full refund including original shipping and handling fees. ProtoArc provides a prepaid label for defective or incorrect items; change-of-mind returns ship at the customer's cost, and an RMA number is required.
Warranty
Keyboards, mice and other accessories carry a 2-year warranty from delivery, and furniture carries 3 years, with select premium chairs eligible for 5 to 10 years. Claims go to support@protoarc.com with your order ID and photos or video.
International
Service covers the US, Canada, the UK, Germany and select EU countries. Remote areas, international orders and oversized items may incur extra fees.

Read our full ProtoArc review and shop all products →

Frequently asked questions

Is the EC300 good for tall people?
ProtoArc designs it for users from 5'4" to 6'1", with a backrest that moves as a unit for fuller back coverage.
Can the lumbar be adjusted separately?
No. The lumbar moves with the entire backrest through 5 height positions.
Is the EC300 Ergonomic Office Chair on sale?
Yes. ProtoArc lists it at $229.99, down from $269.99 (15% off). Sale prices change, so confirm the live price on protoarc.com.
Is there a coupon code for the EC300 Ergonomic Office Chair?
ProtoArc's store-wide code GFPALEKSANDRBODNAR can be entered at checkout on protoarc.com. ProtoArc sets the discount, and some items or sale prices may be excluded.
What is ProtoArc's return policy?
Returns within 30 days of delivery get a full refund including original shipping and handling fees. ProtoArc provides a prepaid label for defective or incorrect items; change-of-mind returns ship at the customer's cost, and an RMA number is required.
How long does ProtoArc take to ship?
Continental US orders ship free over $19.99 with an estimated 3 to 5 business days. Canada is quoted at 5 to 7 business days, and the UK, Germany and select EU countries pay rates calculated at checkout.
Does the EC300 Ergonomic Office Chair come with a warranty?
ProtoArc's published warranty terms: Keyboards, mice and other accessories carry a 2-year warranty from delivery, and furniture carries 3 years, with select premium chairs eligible for 5 to 10 years. Claims go to support@protoarc.com with your order ID and photos or video.
What options does the EC300 Ergonomic Office Chair come in?
Color: Black.
Where can I buy the EC300 Ergonomic Office Chair?
The EC300 Ergonomic Office Chair is sold directly by ProtoArc on protoarc.com. The Shop now button on this page goes straight to the product there, and code GFPALEKSANDRBODNAR can be applied at checkout.
Is the EC300 Ergonomic Office Chair in stock?
It is currently listed as sold out on protoarc.com. Check back, or browse similar items from ProtoArc and other brands below.
Is ProtoArc a legit store?
ProtoArc is a smart pick for desk workers who want ergonomic keyboards, mice or a mesh chair without paying premium-brand prices, and its 2-year accessory warranty and free US shipping over $19.99 lower the risk. Skip it if you need a deeply customizable mechanical keyboard or ship to Hawaii, Alaska or an APO address, where service is restricted. Check which layout and OS a keyboard is built for (several models are Mac-specific or UK layout) before you order. Our full ProtoArc review covers shipping, returns and what to check before ordering.
Is the EC300 Ergonomic Office Chair expensive?
At $229.99 it is toward the top of ProtoArc's range ($9.90 to $292.95 across 110 products), and similar items from other brands run $49.99 to $249.95.

More from ProtoArc

Shop all ProtoArc →

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