---
product_id: 87831067
title: "Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6\" x 8\", 1 PSK 100"
brand: "stayflats"
price: "€ 201.06"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.es/products/87831067-plus-mailers-rigid-shipping-envelopes-tamper-evident-security-with-peel
store_origin: ES
region: Spain
---

# Rigid Design Tamper Evident Easy Opening Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6" x 8", 1 PSK 100

**Brand:** stayflats
**Price:** € 201.06
**Availability:** ✅ In Stock

## Summary

> 📬 Elevate Your Shipping Game!

## Quick Answers

- **What is this?** Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6" x 8", 1 PSK 100 by stayflats
- **How much does it cost?** € 201.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/87831067-plus-mailers-rigid-shipping-envelopes-tamper-evident-security-with-peel)

## Best For

- stayflats enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Rigid construction eliminates the need for extra stiffeners.
- • **Versatile Use:** Perfect for documents, photos, and more!
- • **Corner Protection:** Built-in design safeguards your documents' edges.
- • **Secure Your Deliveries:** Tamper evident closure ensures peace of mind.
- • **Frustration-Free Opening:** Tear strip for quick and easy access.

## Overview

Stayflats Plus Mailers are robust, tamper-evident shipping envelopes designed to protect your important documents during transit. With a peel & seal closure, built-in corner protection, and a user-friendly tear strip, these envelopes ensure that your items arrive in pristine condition. Ideal for a variety of uses, they come in a convenient 100-count pack, making them a must-have for any professional.

## Description

Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6" x 8", 1 PSK 100

## Features

- TAMPER EVIDENT SECURITY: Stayflats Plus envelope mailers have a Peal & Seal pressure sensitive closure which protects your package from tampering during delivery. These envelopes аrе easy to fulfill and close.
- RIGID AND STRONG CONSTRUCTION: The Stayflats Plus envelope mailers eliminate the need for cardboard stiffeners. They are designed with a strong and rigid center-seam which protects your documents and keeps them flat during delivery.
- PROTECTED CORNERS: The corners of your documents are now safe thanks to our Built-In corner protection design. No need to worry about jagged or torn edges. Your documents will arrive in the same condition as you sent them.
- EASY OPENING: This design comes with a tear strip which provides quick, easy and frustration free opening experience for the end user.
- IDEAL FOR: Documents, Photographs, Diplomas, Awards, Calendars, Medical Records, Legal Forms and other bend-sensitive items.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Calumet Carton Company |
| Brand | Stayflats |
| Item Weight | 8.98 pounds |
| Product Dimensions | 11.37 x 10.87 x 6.87 inches |
| Item model number | 1 PSK 100 |
| Color | Kraft |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | Tan Bending Chip |
| Number of Items | 1 |
| Size | 6" x 8" - 100 count |
| Manufacturer Part Number | 1 PSK 100 |

## Images

![Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6" x 8", 1 PSK 100 - Image 1](https://m.media-amazon.com/images/I/61m+nvB8sJL.jpg)
![Plus Mailers | Rigid Shipping Envelopes | Tamper Evident Security with Peel & Seal Pressure Sensitive Closure | Built-in Corner Protection | Kraft | 100 Per Case | 6" x 8", 1 PSK 100 - Image 2](https://m.media-amazon.com/images/I/71zdXoC2anL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Will an 18x24 poster fit in the 18x24 mailer or will it be too tight? Thanks!**
A: We believe it will be too tight, we recommend the next size up which is the 20 x 27.

**Q: I just ordered the 12.75 x 15 white stayflat mailers which are listed as manufactured by calumet carton. are they made of .028 thickness/weight board?**
A: I don't think it's possible to answer this question. There's nothing stamped on the mailers to indicate the thickness. They're certainly sturdy enough to mail photos.

**Q: Will the 9" x 7" envelopes (asin b01cnaql84) fit a 9" x 6" x 3/8" book? and how much do they weight?  thank you**
A: no they won't. I use them for a 5.5x8.5"" booklet, which is a tight fit. I'd look into a larger envelope for your book. hope this helps.

**Q: What does it cost to mail?**
A: The envelope qualifies for first class and media mail at the post office.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Perfect for my needs
  

*by C***R on Reviewed in the United States on March 1, 2022*

The envelopes are exactly what I need. I mail flat art in them and don't want them to bend. The artwork includes a foam core board and I add a corrugated board for the front of the art. This may be overkill since the envelop is quite sturdy.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Good enough
  

*by P***T on Reviewed in the United States on May 20, 2020*

I'm shipping artwotks and I ran out of my old white mailers. I tried this brown one and it's good enough. The adhession is great! As you can see in the picture, I tested how far my mailers will bend with the same weight placed on top of each. The brown one is dense so it's bends noticeably; lightweight so you can save slightly on the postage. I don't think it will crash in transit. I'll update this review whenever something happens. (I hope not). Unlike other mailers, this one has some perforation on the upper edge to fold the flap. It's odd to discover it at first but not a big deal.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Definitely reordering in the future
  

*by J***J on Reviewed in the United States on April 5, 2020*

I bought these last year but started using them more frequently recently to ship stickers and small prints, and I gotta say, these are great! Just to be extra safe, I still put a layer of cardboard. However, you can totally get away with no extra padding. These are surprisingly lightweight too: just stickers and envelope is 1oz, and with the cardboard, they come out to 2oz! I will say: be sure to spend an extra few seconds rubbing your shipping labels onto these. While I've never had any issues with labels coming off, I could see it possibly being an issue depending on how tacky the adhesive is.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-04*