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Best One Size Backpack Rain Covers of 2026

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John Zimmer

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When it comes to protecting your backpack from the rain, One Size Backpack Rain Covers are a reliable and convenient solution. These covers are designed to fit most backpack sizes and are made from waterproof materials that keep your belongings safe and dry during wet weather. They are lightweight and easy to pack, making them ideal for outdoor activities such as hiking, camping, and travelling. With One Size Backpack Rain Covers, you can enjoy your adventures without worrying about your gear getting wet.

At a Glance: Our Top Picks

Karrimor Unisex Water Resistant Rucksack Cover Cover #TOP 1

Karrimor Unisex Water Resistant Rucksack Cover

9.8
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Unigear Waterproof Anti-Rain Backpack Cover Cover #TOP 2

Unigear Waterproof Anti-Rain Backpack Cover

9.7
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LAMA 2pcs Waterproof Rain Cover Cover #TOP 3

LAMA 2pcs Waterproof Rain Cover

9.5
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Top 10 One Size Backpack Rain Covers

#TOP 1 Best Water-Resistant Backpack Rain Cover

Karrimor Unisex Water Resistant Rucksack Cover

Karrimor Unisex Water Resistant Rucksack Cover Cover

Karrimor Unisex Rucksack Rain Bag Cover Dry Raincovers Water Resistant 10-20 Litres One Size

The Karrimor Rucksack Rain Cover is an essential accessory for keeping your bag dry during unpredictable weather. With its water-resistant finish, you can confidently venture out knowing your belongings are protected from the rain. The elasticated closure ensures a snug fit, preventing the cover from slipping off while you're on the move. Additionally, its pack-away design makes it convenient to store when not in use, allowing you to easily carry it in your rucksack without taking up much space.

9.8
FTB Score
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What We Like

  • Water resistant finish
  • Elasticated closure for secure fit
  • Convenient pack-away design
  • Karrimor brand reliability
#TOP 2 Best Hiking Backpack Rain Cover

Unigear Waterproof Anti-Rain Backpack Cover

  • Unigear
  • X001705B3V
  • Black
  • S (10-20L)
Unigear Waterproof Anti-Rain Backpack Cover Cover

Unigear Anti-Rain Backpack Cover, 10-90L Waterproof Dustproof Durable Abrasion Resistant Protective Cover for Camping, Hiking, Travel, Cycling (Black, S)

The Unigear Rain Backpack Cover offers excellent waterproof protection made from durable 70D 210T nylon, ensuring your backpack stays dry even in heavy rain. Its easy-to-use double-sided zipper allows for quick application, making it perfect for unexpected downpours. The adjustable cross straps ensure a snug fit on various backpack sizes, preventing the cover from slipping off during use. Available in multiple sizes, you can easily find the perfect fit for your bag, keeping it clean and protected from rain, dirt, and scratches during your outdoor adventures.

9.7
FTB Score
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What We Like

  • Highly waterproof material
  • Quick and easy to use
  • Adjustable for various sizes
  • Protects against dirt and scratches
#TOP 3

LAMA 2pcs Waterproof Rain Cover

  • LAMA
  • LM010
  • 2 Pcs Black
LAMA 2pcs Waterproof Rain Cover Cover

LAMA 2pcs Waterproof Rain Cover for Backpack, Reflective Rainproof Protector for Anti-dust and Anti-Theft XS 10L-17L Black

Features

  • Waterproof Bag Cover For Avoid Falling: Adjustable Buckle And Elastic Rim Of The Waterproof Backpack Rain Cover Provided Extra Stability And Make Sure Your Backpack Gets Fully Covered, No More Falling Off
  • Backpack Rain Cover: Dual-Layer Design, The Exterior Layer Adopts Wear-Resistant Fabric To Avoid Scratching And Dirt. The Inner Layer Adopts Waterproof Coating To Avoid Water, Rain, Fog, And Snow
  • Portable Pouch & Reflective Strip: Come With Compact Pouch That You Can Put It In Your Backpack To Save Space. 3cm Wide Reflective Strip On The Front Of The Rucksack Cover. Highly Visible When It Meets Lights In The Dark Night, Rainy And Cloudy Days. Helps You And Your Children Safety In Outdoors
9.5
FTB Score
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#TOP 4

GUKOY Waterproof Rain Cover with Reflective Strap

  • GUKOY
  • BackCover
  • Black
GUKOY Waterproof Rain Cover with Reflective Strap Cover

GUKOY Waterproof Rain Cover with Reflective Strap for Backpack, 2 Adjustable Anti Slip Cross Buckle Strap, Rainproof Snowproof Dustproof Anti-Frost Covers (L for 41-55L backpack)

Features

  • [Anti Slip Off Design] There Are Buckle Straps And Elastic Rim To Keep Backpack Cover Secure On The Pack . The Convenient Buckle Straps At The Top Can Help Tighten And Prevent The Backpack Cover From Slipping Off While The Elastic Attaches Firmly On Your Backpack , Never Worry About Your Backpack Cover Blowing Away In Strong Winds Or Being Pushed Off By Shoulder Straps.
  • [Quality & DurabiLity] The Backpack Cover Consists Of Tear-Resistant Nylon And A High-Quality PU Coating, Offer Reliable Protection Against Rain And Moisture.
  • [Highly Reflective] Visible To All Road Users From A Distance Of 100 Meters. A Cheap Insurance For More Visibility And Increased Protection During The Day, At Dusk And At Night.
9.4
FTB Score
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#TOP 5

Lethra 2PCS Waterproof Backpack Rain Cover

  • Lethra
  • Black
  • One Size
Lethra 2PCS Waterproof Backpack Rain Cover Cover

Lethra 2PCS Waterproof Backpack Rain Cover, Waterproof and Dustproof Bag Rain Cover, Rucksack Rain Cover for Outdoor Traveling, Climbing, Hiking, Camping, Black and Army Green (30L-40L)

Features

  • [Waterproof And Avoid Falling] Elastic Rim Of The Waterproof Backpack Rain Cover Provided Extra Stability And Make Sure Your Backpack Gets Fully Covered, No More Falling Off.
  • [190T Polyester] Our Backpack Rain Cover Is Made Of 190T Polyester, And The Inner Layer Is Made Of 190T Silver Coated Thickened Material. The Waterproof Index Of The Fabric Is Over 2000, Which Can Prevent Outdoor Heavy Rain And Protect Your Backpack From Rain Intrusion In Heavy Rain.
  • [Multipurpose Use] This Rucksack Rain Cover Is Widely Used In Hiking, Cycling, Climbing, Camping And Daily Commuting. It Can Protect Your Equipment, Laptops And Other Items From Getting Wet. It Is An Good Choice For Your Outdoor Activities.
9.4
FTB Score
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#TOP 6

Fjallraven 23791-525 Kånken Rain Cover Backpack cover Unisex UN Blue Size One Size

Fjallraven 23791-525 Kånken Rain Cover Backpack cover Unisex UN Blue Size One Size Cover

Fjallraven 23791-525 Kånken Rain Cover Backpack cover Unisex UN Blue Size One Size

Features

  • Integrated Bag With Velcro
  • Backpack Rain Cover
  • The Buttons At The Top Attach It To The Backpack Shoulder Straps
9.3
FTB Score
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#TOP 7

LICQIC Waterproof Rain Cover for Backpack

LICQIC Waterproof Rain Cover for Backpack Cover

LICQIC Waterproof Rain Cover for Backpack, Reflective Rucksack Rain Cover for Outdoor, Hiking, Camping, Traveling, Cycling

Features

  • Won't Come Off: The Backpack Rain Cover Has Two Adjustable Straps On The Back That Act As A Hold-Down To Ensure That The Backpack Cover Does Not Come Off
  • Waterproof Protection: The Waterproof Bag Cover Is Made Of Waterproof, Tear-Resistant Nylon On The Outside And Has A Waterproof Coating On The Inside With A Maximum Water Pressure Of 1800 mPa. It Will Keep Your Pack Dry In The Rain And Snow
  • Versatile Use: This Backpack Pack Cover Is Suitable For Backpacks, Computer Bags, School Bags And More. It Is A Necessity For Outdoor Travel And Everyday Life; It Can Also Be Used As A Computer Screen Cover, Seat Cushion, Bike Rain Mat And Any Equipment That Needs Protection From The Rain On Rainy Days
9.3
FTB Score
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#TOP 8

EDLMKM 2 Pack Waterproof Rain Cover

  • EDLMKM
  • Black
  • One Size
EDLMKM 2 Pack Waterproof Rain Cover Cover

EDLMKM 2 Pack Waterproof Rain Cover for Backpack, Backpack Rain Cover, Waterproof Rain Cover with Reflective Strap for Backpack, Reflective Rucksack Covers, for Hiking Camping Traveling Cycling

Features

  • Waterproof Bag Cover For Avoid Falling: Adjustable Buckle And Elastic Rim Of The Waterproof Backpack Rain Cover Provided Extra Stability And Make Sure Your Backpack Gets Fully Covered, No More Falling Off.
  • Material: Rainproof Backpack Protector Is Made Of Premium Waterproof Polyester Material, Which Is Dust Proof, Rain Proof, Scratch Proof, Wind And Snow Proof. Rucksack Rain Cover Is Durable Enough For Long Time Use.
  • Versatile Use: This Backpack Pack Cover Is Suitable For Backpacks, Computer Bags, School Bags And More. It Is A Necessity For Outdoor Travel And Everyday Life; It Can Also Be Used As A Computer Screen Cover, Seat Cushion, Bike Rain Mat And Any Equipment That Needs Protection From The Rain On Rainy Days.
9.3
FTB Score
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#TOP 9

Salzmann Reflective Waterproof Rucksack Cover 28-40L

Salzmann Reflective Waterproof Rucksack Cover 28-40L Cover

Salzmann Reflective Rucksack Cover | 28–40L | Hi-Vis Waterproof Rain Cover for Backpack Cycling, Commuting & Hiking

The Salzmann Reflective Cover comes in two sizes to fit most backpacks, up to 28L for everyday use and 40L for larger rucksacks, ideal for cycling, commuting, and hiking. Its 3M Scotchlite reflective material ensures you stay visible to drivers from as far as 200 metres, enhancing your safety in low-light conditions. With a high waterproof rating of 15,000 mm and tightly woven fabric, it keeps your belongings dry and protected in all weather. The cover is designed to stay securely in place with elasticated edges and adjustable straps, even during active use.

9.1
FTB Score
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What We Like

  • Highly reflective for safety
  • Waterproof and weatherproof
  • Fits backpacks up to 40L
  • Secure fit with straps
#TOP 10

Trespass Waterproof Rucksack Cover for Small Backpacks

Trespass Waterproof Rucksack Cover for Small Backpacks Cover

Trespass Rucksack Cover Rain - 1500mm Waterproof, Drawcord & Toggle Adjustment, Sizes: Small 10-25L, Medium 35-50L, Large 60-75L, 210T Polyester Ripstop

The Trespass Rucksack Cover is designed to keep your backpack dry, featuring a waterproof rating of 1500 mm. This ensures that your gear remains protected even in heavy rain. The cover is made from durable 210D polyester ripstop material, which adds to its longevity and resilience. With its cord tightening mechanism, it fits snugly around smaller backpacks, preventing any water ingress. This makes it an essential accessory for outdoor enthusiasts who want to safeguard their belongings during unexpected weather changes.

8.9
FTB Score
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What We Like

  • Highly waterproof material
  • Durable and long-lasting
  • Snug fit for smaller backpacks
  • Prevents wet gear

Frequently Asked Questions (FAQs)

1. Do you need a rain cover for backpack?

A rain cover is recommended because it keeps your backpack and all its contents (inside and outside of your pack) from getting wet when hiking in the rain. Combining a rain cover with a waterproof pack liner and dry bags is the best method for ensuring your gear stays dry during heavy downpours.

2. How do you make a rain bag cover?

Create a makeshift bag cover. Take a plastic sheet, garbage bag, or some other similar, waterproof material, and tuck it between your back and backpack. Pull the material so that part of it is pinned between your back and the bag, but the rest of the material is draped over the back of the bag to protect it.

3. How do you get the death stranding backpack cover?

How To Get The Backpack Cover. The backpack cover becomes available to get once you start doing deliveries at the Distribution Center South of Lake Knot City during Episode 3. It's the closest landmark to an optional prepper, known as The Collector, that you can connect to the Chiral Network.

4. What are rain covers?

Backpack Rain Covers are purpose built covers that fit over your pack. They come in varying sizes and and are waterproof, so the idea is for them to keep the rain from getting into your pack.

Editor's Notes

During our one size backpack rain cover research, we found 101 one size backpack rain cover products and shortlisted 10 quality products. We collected and analyzed 32,745 customer reviews through our big data system to write the one size backpack rain covers list. We found that most customers choose one size backpack rain covers with an average price of £8.32.

The one size backpack rain covers are available for purchase. We have researched hundreds of brands and picked the top brands of one size backpack rain covers, including Karrimor, Unigear, LAMA, GUKOY, Lethra.

Written by

John Zimmer Avatar

John Zimmer

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.