Everflex Conference XC20525

35.0" Height

20.25" Width

25" Depth

20" Seat Width

18.5" Seat Height

18.6 lbs. Weight

8 high Stacks

1.1 yrds. C.O.M. Req.

Product Overview

The EVERFLEX™ Conference stacker XC20525 blends the comfort of a flexible back with the ergonomic characteristics of Bertolini’s proprietary Flex-Fit™ polymer seat providing your guests with five star seating comfort that will last all day long. You’ll love the unbeatable durability as much as your guests will love the five star comfort. Just take the industry’s strongest conference banquet chair frame, our ZERO Maintenance Flex-Fit™ Seat with BosScrew™ technology, and the million cycle EVERFLEX™ composite spring system for a chair that lasts longer and needs replacing less often. At nearly half the cost of other flex back chairs manufactured in the USA today, the EVERFLEX™ delivers five star comfort and a strong return-on-investment perfect for today’s conference facilities.

Technical Specs

Frame Construction:

Back Sub-frame:

3/4" 16 gauge square steel tubing, flux-cored arc welded and mandrel-formed assembly.

Seat Sub-frame:

3/4" 16 gauge square steel tubing, flux-cored arc welded and mandrel-formed loop assembly with rear support bar.

Flex Device:

Flex device constructed using composite pultrusion springs tested to over 1 million flex cycles. Everflex system included in structural warranty.

Million Cycle Everflex


1" 17 gauge radius edged square tubing for 6% more strength than standard 1" 16 gauge square tubing.

Stack Bars:

None. Stacks leg on leg, 8 high.

Torsion Bars:

5/16” diameter solid steel torsion rods for superior vibration absorption.

Steel Tubing:

    Meets ASTM A-1008-03-CS-TYPE B/SAE-1010-AK
  • 16 gauge wall thickness of .060" +/- 10%.
  • 17 gauge wall thickness of .054" +/- 10%
  • 18 gauge wall thickness of .048" +/- 10%


28+ individual MIG welds

Bertolini Inc. frames are made from the strongest American steal in the seating industry. Frames are randomly tested for quality and durability. Bertolini exceeds all ANSI/BIFMA requirements. Bertolini regularly test to three or four times BIFMA standards to ensure the best in quality and performance.

Self-Tightening BosScrew™

Back Construction:

Back Attachment:

A slide-on Ergo-V back with multi-contoured V shape that supports the lower back while gently cradling the upper shoulders.

Inner Back:

Ergo-V with 1.5" thick 1.2 LB/CU.FT., flame retardant polyurethane foam. Meets CAL-117-2013 requirements.

Flex Back:

Exclusive Everflex flex-back system featuring 2 composite flex springs hidden under the chairs seat. Includes flex bumpers ensuring users a pinch-free experience. Surpasses all BIFMA requirements and standards. Cycle tested to over 1 million full flex cycles. Features dining pitch in upright position.

Ergo-V Back

Seat Construction:

Flex-fit blow molded seat made from post-industrial recycled plastic for the most environmentally friendly conference chair on the market. Seat offers double the break strength of a traditional wood or wood/webbed seat base while still offering a flexible base for comfort and foam life. Seat offers 1.5" of 3 LB/CU. FT. Density and ILD of 40 Lbs commercial grade American foam. Meets CAL-117 requirements.

Innovative Flex-Fit™ Seat



Four Clear, Non-Corrosive, Ribbed and Double Booted Rocker Glides offered exclusively by Bertolini Inc. Self-leveling rocker glides eliminate the common failures of swivel-glides and are backed by a lifetime replacement guarantee.

Stack Buttons:

Friction-fit, non-rigid polymer stack buttons providing non-marring stacking assistance and support.

Variations to this Model include:

  • XC20525A: with arms
  • XC20125: non-flexback
  • XC20505: inner back cushion without cutaway lumbar


20 Year Structural Frame Warranty, 10 Year Component Warranty. Glides for Life of your chair.

Often specified with these accessories:

  • Handholds:

    For additional handling ease on select models.

  • Bookrack

    Accessible from the rear with two-book capacity.

  • Retractable Interlocks

    These interlocks can be retracted to hide away when not in use.


Longest Conference Chair Warranty in the Industry

20 years structural and 10 years components.

Maximum ROI for Your Property

We've brought together the Industry's Strongest Conference Chair Frame, zero maintenance seat and longest warranty to provide you with maximum return on investment.

Sustainability Profile

A Banquet Chair that is Built and Sourced Locally in the USA:

Quality built in the USA for a chair that lasts longer and needs replacing less often; locally sourced with components such as recyclable USA steel, bio-based foam cushioning, and 30+% post industrial recycled seat polymers.

Read more about our sustainability efforts...


Available Downloads for this Product

Download Our Banquet Chair Overview(PDF)

Download Specifications Sheet(PDF)

For a complete list of all available downloads visit our Download Page.