---
product_id: 435036820
title: "100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable"
brand: "national allergy"
price: "$38.34"
currency: USD
in_stock: true
category: "National Allergy"
url: https://www.desertcart.us/products/435036820-100-cotton-king-size-pillow-protector-zippered-allergy-pillow-cover
store_origin: US
region: United States of America
---

# Auto-locking zipper closure 2.6 micron pore size blocks allergens King size 21x37 in 100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable

**Brand:** national allergy
**Price:** $38.34
**Availability:** ✅ In Stock

## Summary

> 🛌 Sleep Clean, Sleep Cool, Sleep Protected — Because Your Pillow Deserves the Best!

## Quick Answers

- **What is this?** 100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable by national allergy
- **How much does it cost?** $38.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/435036820-100-cotton-king-size-pillow-protector-zippered-allergy-pillow-cover)

## Best For

- national allergy enthusiasts

## Why This Product

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

## Key Features

- • **Perfect King Size Fit:** Tailored 21x37 inch cover fits your king pillow seamlessly under any pillowcase.
- • **Secure Zippered Encasement:** Auto-lock zipper with fabric shield ensures full pillow protection without gaps.
- • **Breathable & Silent Comfort:** 100% cotton weave lets heat escape—no crinkle, no plastic noise, just pure softness.
- • **Doctor & Allergist Approved:** Trusted 2.6 micron weave keeps allergens out for healthier sleep.
- • **Effortless Care & Durability:** Machine washable with lifetime warranty—easy upkeep for lasting freshness.

## Overview

This 100% cotton king size pillow protector features a patented 2.6 micron mean pore size weave, clinically recommended by doctors and allergists to block allergens effectively. Its secure auto-locking zipper and fabric shield fully encase your pillow, ensuring no gaps for dust mites or allergens. Breathable and noiseless, it maintains natural airflow and comfort without plastic membranes. Sized perfectly at 21x37 inches, it fits king pillows and is machine washable with a lifetime warranty, making it a durable, hypoallergenic sleep essential.

## Description

Buy 100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable: Pillow Protectors - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- 100% Cotton
- Doctor & Allergist Recommended: National Allergy's patented 100% cotton weave features a proprietary 2.6 micron mean pore size, delivering tightly woven, breathable protection trusted by doctors, allergists, and families for decades.
- Secure Zippered Encasement: These pillow protectors with zipper closure encase your pillow on all six sides with a two-part system. The auto-locking zipper stays closed, and a fabric shield under the closure helps minimize any opening at the seam.
- Soft, Quiet & Breathable: The tight cotton weave lets heat escape so you sleep cool, with no crinkle, stiffness, or plastic membrane. A noiseless cover that preserves the natural feel and airflow of your pillow night after night.
- Fits King Size Pillows: White pillow case protectors, 21 x 37 inches, made for King bed pillows. Slip each cover under your everyday pillowcase for a durable protective layer. Also available in Standard and Queen.
- Easy Care, Not Waterproof: National Allergy's pillow protectors are machine washable with the zipper closed. These breathable cotton covers contain no plastic or vinyl membrane and are not designed to block liquids or spills.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09YS2NSYN |
| Best Sellers Rank | #12,026 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #13 in Bed Pillow Protectors |
| Brand Name | National Allergy |
| Color | 1 Pack |
| Customer Reviews | 4.6 4.6 out of 5 stars (11,027) |
| Item Dimensions L x W | 37"L x 21"W |
| Item Type Name | Pillow Protector |
| Item Weight | 0.29 Kilograms |
| Manufacturer | National Allergy |
| Manufacturer Warranty Description | 100% Lifetime Warranty |
| Material Type | Cotton |
| Product Care Instructions | Machine Wash |
| Size | King (21x37) |
| Thread Count | 300 |
| UPC | 643910022047 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** National Allergy
- **Color:** 1 Pack
- **Material:** Cotton
- **Product Care Instructions:** Machine Wash
- **Size:** King (21x37)

## Images

![100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable - Image 1](https://m.media-amazon.com/images/I/612D2H2PrqL.jpg)
![100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable - Image 2](https://m.media-amazon.com/images/I/71bguCyb3OL.jpg)
![100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable - Image 3](https://m.media-amazon.com/images/I/81VFE7Rr9sL.jpg)
![100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable - Image 4](https://m.media-amazon.com/images/I/41Cg0gtYGOS.jpg)
![100% Cotton King Size Pillow Protector, Zippered Allergy Pillow Cover | 21 x 37 in, Single, 2.6 Micron Mean Pore, AAFA Certified, Hypoallergenic Zippered Pillowcase Encasement, Machine Washable - Image 5](https://m.media-amazon.com/images/I/718PbeAz80L.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-04*