---
product_id: 289722251
title: "Expanding Accordion File Pockets, Extra Durable, Expands 3.5\", Letter Size, Reinforced with Dupont Tyvek Material, 10/Box (15421), Brown"
brand: "pendaflex"
price: "€ 85.66"
currency: EUR
in_stock: true
reviews_count: 13
category: "Pendaflex"
url: https://www.desertcart.gr/products/289722251-expanding-accordion-file-pockets-extra-durable-expands-3-5-letter
store_origin: GR
region: Greece
---

# 3.5" expansion for bulky files Fits standard letter size (8.5x11") Tyvek-reinforced tear resistance Expanding Accordion File Pockets, Extra Durable, Expands 3.5", Letter Size, Reinforced with Dupont Tyvek Material, 10/Box (15421), Brown

**Brand:** pendaflex
**Price:** € 85.66
**Availability:** ✅ In Stock

## Summary

> 📁 Elevate your filing game—expand, protect, and organize like a pro!

## Quick Answers

- **What is this?** Expanding Accordion File Pockets, Extra Durable, Expands 3.5", Letter Size, Reinforced with Dupont Tyvek Material, 10/Box (15421), Brown by pendaflex
- **How much does it cost?** € 85.66 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/289722251-expanding-accordion-file-pockets-extra-durable-expands-3-5-letter)

## Best For

- pendaflex enthusiasts

## Why This Product

- Trusted pendaflex brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile & Trusted by Pros:** Ideal for home offices, law firms, and classrooms—organize manuals, tax returns, court files, and more with confidence.
- • **Eco-Conscious & Professional:** Made with 30% recycled fiber, combining sustainability with premium office-grade quality.
- • **Expand Your Storage Capacity:** Holds up to 700 sheets with 3.5" expandable gussets—perfect for growing projects and bulky documents.
- • **Effortless Access & Organization:** Front panel folds down for quick, open-top access to your files—streamline your workflow with ease.
- • **Built to Last with Tyvek Reinforcement:** Triple-reinforced edges with DuPont Tyvek material ensure tear-resistant durability where it matters most.

## Overview

Pendaflex Expanding Accordion File Pockets offer a robust 3.5" expansion to accommodate up to 700 sheets of letter-size documents. Reinforced with durable DuPont Tyvek material at key stress points, these folders resist tearing and wear, ensuring long-lasting use. Designed with double-thick manila lining and a fold-down front panel for easy access, they are perfect for professionals managing bulky paperwork. Sold in boxes of 10, these eco-friendly file pockets combine sustainability with trusted Pendaflex quality, making them a staple for home offices, legal practices, and classrooms alike.

## Description

Pendaflex Accordion File Pockets expand 3.5 inches to hold up to 700 sheets—perfect for home, small business, homeschool or classroom organization. Store a wide variety of bulky items like insurance policies, home inspections, manuals. user guides, court documents, case files, construction paper, coloring pages, arts and crafts and more. Protective 6-1/2" high expanding sides are reinforced along the top and bottom edges with durable Tyvek material to prevent wear and tear at key stress points extending the life of your pocket file folder. These straight-cut redrope pockets have double-thick manila lined panels and another Tyvek strip on the back panel along the fold for additional support. If your massive files put a strain on ordinary folders, consider this upgrade. The front panel folds down for easy, open-top access to whatever's inside. File pockets bring quick order to unorganized papers—keep them on a desktop, in a file drawer, or in a heavy duty file storage box. Pendaflex redrope pockets expand so big projects have room to grow along with high expanding sides to keep papers from falling out. These accordion files are made from 30% recycled fiber with 30% post consumer fiber. Letter Size. Front measures 9" x 11.75", back measures 9.5" x 14.15". 3.5" Expansion. Redrope. Box of 10. Tyvek is a trademark of DuPont used under license by TOPS Products LLC.

Review: Holds up well - Excellent product! I have used these folders for many years and have always been pleased. They expand, but are still strong enough that they do not tear up easily.
Review: Pendaflex Expanding Accordion File Pockets - excellent quality, sturdy & flexible

## Features

- Stock up on boxes of 10 file pockets for your home, small business, or law office—Pendaflex accordion folders expand 3-1/2" to store manuals, tax returns, court documents and other bulky paperwork
- Straight tab redrope expanding files have double-thick manila lined panels that fold down for easy, open top access to letter size documents; durable enough for home or office organization
- Each file pocket has 3 points of reinforcement made from tear-resistant Tyvek material: along the top and bottom edges of the gusseted expanding sides and along the back fold of the full length tab
- The front of the expanding accordion organizer measures 9 inches x 11.75 inches, the back 9.5 inches x 11.75 inches with 6.5 inch high sides to keep papers, file folders and smaller items contained
- A standby of lawyers, accountants and homeschool teachers, brown file pockets can help organize any home office—store in a file cabinet, file storage box or file drawer, or keep on a shelf or tabletop

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08QTWVWD8 |
| Best Sellers Rank | #37,538 in Office Products ( See Top 100 in Office Products ) #147 in File Jackets & File Pockets |
| Brand | Pendaflex |
| Brand Name | Pendaflex |
| Color | Brown |
| Customer Reviews | 4.7 out of 5 stars 715 Reviews |
| Fastener Capacity | 500 |
| Item Dimensions L x W x Thickness | 12.25"L x 10.38"W x 4.12"Th |
| Item Type Name | File Pocket |
| Item Weight | 2.1 pounds |
| Manufacturer | TOPS Products |
| Manufacturer Part Number | 15421 |
| Material | Paper |
| Material Type | Paper |
| Model Number | 15421 |
| Number Of Pockets | 1 |
| Package Size Name | Box of 10 |
| Paper Size | 8.5 x 11 |
| Sheet Size | 8.5 x 11 |
| Special Features | Expandable |
| Style | File Pocket |
| Supported Paper Sizes | Letter (8.5 x 11 inches) |
| Tab Cut | Straight |
| Tab Position | Top |
| UPC | 078787154216 |
| Unit Count | 10 Count |

## Product Details

- **Brand:** Pendaflex
- **Color:** Brown
- **Material:** Paper
- **Sheet Size:** 8.5 x 11
- **Style:** File Pocket

## Images

![Expanding Accordion File Pockets, Extra Durable, Expands 3.5", Letter Size, Reinforced with Dupont Tyvek Material, 10/Box (15421), Brown - Image 1](https://m.media-amazon.com/images/I/61apL2iIpeL.jpg)

## Available Options

This product comes in different **Pattern** options.

## Questions & Answers

**Q: will letter-size manilla file folders fit inside?**
A: Yes, they do. I use these to group items instead of hanging folders. You can actually fit more into your file drawer neatly and then easy to pull out and go through.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Holds up well
*by R***Y on July 2, 2026*

Excellent product! I have used these folders for many years and have always been pleased. They expand, but are still strong enough that they do not tear up easily.

### ⭐⭐⭐⭐⭐ Pendaflex Expanding Accordion File Pockets
*by B***R on November 25, 2025*

excellent quality, sturdy & flexible

### ⭐⭐⭐⭐ Works well and seem sturdy.
*by G***. on October 8, 2023*

Nice price, medium quality, great size for my projects.

## Frequently Bought Together

- Pendaflex Expanding Accordion File Pockets, Extra Durable, Expands 3.5", Letter Size, Reinforced with Dupont Tyvek Material, 10/Box (15421), Brown
- Pendaflex Expanding File Pockets, Letter Size, 5.25" Expansion, Reinforced with DuPont™ Tyvek® Material, Letter Size, Redrope, 10 Per Box (1534G-OX)
- Amazon Basics 1/3-Cut Tab, Assorted Positions File Folders, Letter Size, Manila - Pack of 100

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-30*