Rain Covers for Rucksacks: The 2026 Buyer's Guide
A 2026 guide to rucksack rain covers for UK hikers, comparing waterproofing, hydrostatic head ratings, fit and packability across budget and premium picks.
Rain Covers for Rucksacks: The 2026 Buyer’s Guide
Let’s be honest: if you spend any time outdoors in the UK, you’re going to get wet. It’s not a question of if, but when. A proper rucksack rain cover is the difference between a damp, miserable trip and one where your sleeping bag stays bone-dry and your pack contents remain pristine. Whether you’re tackling a multi-day hike on the West Highland Way, camping in a Cumbrian downpour, or just commuting with a rucksack in Manchester, the right rain cover is essential kit.
In this guide, we’ve researched the market to bring you the best rucksack rain covers for 2026. We’ve analysed manufacturer specs, sifted through owner reviews on Reddit’s r/UKhiking and r/camping, and compared expert opinions from publications like Trail Magazine and Outdoor Gear Lab. The result is a focused look at five specific products that stand out for durability, fit, and value. Let’s get you sorted.
Quick Picks
Here are our top three rain covers for 2026, selected for different needs and budgets.
| Product | Best For | Key Reason | Packed Size | Price Guide |
|---|---|---|---|---|
| Ortlieb Pack 35-55L | Long-term durability | Welded seams, 10,000mm+ HH rating, ten-year warranty | Approx. 18×10cm | Around £55–£70 |
| Alpkit Dry Bag Rucksack Cover | Lightweight hiking | Packs to approx. 10×5cm, fully waterproof PU-coated fabric | Approx. 10×5cm | Under approximately £15 |
| Decathlon Forclaz 500 | Budget-conscious campers | Reflective details, secure elasticated fit, taped seams | Approx. 12×8cm | Under approximately £15 |
What to Look for in a Rain Cover
Before we dive into the specific products, it’s worth understanding the key features that separate a good rucksack rain cover from a poor one. This will help you make an informed choice.
Material and Waterproofing
The fabric is everything. Most covers use either polyester with a polyurethane (PU) coating or nylon with a silicone or PU coating. PU-coated fabrics are generally more durable and offer better waterproofing, but they can be heavier and less packable. Silicone-coated nylon is lighter and more compressible but can be less abrasion-resistant.
Hydrostatic head (HH) ratings are a useful guide where published: look for at least 1,500mm for reliable rain protection, and 3,000mm or more for heavy, prolonged downpours. However, it’s worth noting that many budget covers — including popular Decathlon models — do not publish HH ratings at all. In those cases, look instead for alternative waterproofing indicators: taped or welded seams (which prevent water ingress at stitch points), a stated PU coating weight (higher denier fabrics with heavier PU layers generally perform better), and whether the product description specifies a fully seam-sealed construction. Premium brands such as Ortlieb publish full HH ratings and use welded construction; budget brands typically rely on PU-coated fabric with elasticated hems to keep water out.
You may also want to consider pairing a rain cover with pack liners or internal dry bags — particularly for electronics, sleeping bags, and clothing — as a belt-and-braces approach to moisture management on multi-day trips. Retailers such as Go Outdoors and Cotswold Outdoor stock both rain covers and compatible dry bag systems.
Fit and Sizing
A cover that’s too small won’t protect your gear; one that’s too large will flap in the wind and catch like a sail. Most covers are sized by rucksack capacity (e.g., 20–35L, 35–55L, 55–70L). However, the shape of your pack matters too. Tall, narrow packs may need a different fit than short, wide ones. Look for covers with adjustable drawcord closures at the bottom and sometimes at the top, allowing you to cinch them tight against the pack.
To measure your rucksack for a rain cover, check the manufacturer’s stated volume in litres and cross-reference with the cover’s stated compatible volume range. If your pack sits between sizes, sizing up is generally preferable — a slightly oversized cover can be cinched in, while an undersized one will leave the base of your pack exposed.
Attachment System
A rain cover that blows off is useless. The best covers use a combination of:
- Elasticated hem with a drawcord to secure the bottom.
- Clip-on straps that attach to the rucksack’s daisy chains or compression straps.
- Velcro loops for the top handle or shoulder straps.
Weight and Packability
For backpacking, every gram counts. A heavy cover can add unnecessary weight. Lightweight covers pack down to the size of a tennis ball, while heavier duty ones might be the size of a small water bottle. Consider your typical trip length and how much you’re willing to carry.
Managing Condensation
If your rucksack is packed with damp gear, or you’re generating heat on a steep ascent, condensation can build up between the cover and the pack. Standard rucksack rain covers do not feature mesh or vented panels — any opening large enough to release moisture would also allow water ingress. The practical solution, as recommended by gear writers at Trail Magazine, is to use internal dry bags or a pack liner for your most moisture-sensitive items (sleeping bag, down layers, electronics), so that even if condensation forms inside the cover, your critical gear remains protected.
The Best Rain Covers for 2026
We’ve narrowed the field down to five standout products, covering different budgets and use cases.
1. Ortlieb Pack 35-55L – The Durability King
If you want a rucksack rain cover that will outlast your rucksack, this is it. The Ortlieb Pack is made from Ortlieb’s proprietary PU-coated nylon with fully welded seams. There’s no stitching to leak, no tape to peel. It’s essentially a dry bag shaped to fit your pack.
- Waterproofing: The welded construction means zero water ingress. Ortlieb rates this cover at a hydrostatic head exceeding 10,000mm, according to their published product specifications.
- Fit: Available in multiple sizes (the 35–55L version fits most standard-shaped packs well). The elasticated hem and a single drawcord at the bottom keep it secure.
- Weight: 220g, as listed in Ortlieb’s published product specifications for the 35–55L size. It’s not the lightest, but the durability justifies the weight.
- Packed size: Approximately 18×10cm.
- Price: Typically around £55–£70 at major UK retailers including Cotswold Outdoor and Go Outdoors. It’s a significant investment.
Check Price at Cotswold Outdoor → (affiliate link — see disclosure)
Community Feedback: Across Reddit’s r/UKhiking community, owner reviews consistently describe the Ortlieb Pack as exceptionally reliable in sustained bad weather, with a common theme being that the cover continues to perform like new after years of hard use. The most frequently noted criticisms are the price point and the fact that it doesn’t pack down as compactly as lighter alternatives.
Verdict: The best long-term investment for serious hikers and mountaineers who demand absolute waterproofing and don’t mind the extra weight or cost. If you’re heading to the Scottish Highlands in winter, this is the one.
2. Alpkit Dry Bag Rucksack Cover – The Lightweight Champion
Alpkit, the Sheffield-based outdoor brand known for exceptional value, produces one of the most popular lightweight rucksack rain covers on the UK market. It uses a PU-coated ripstop nylon construction with a fully taped seam, keeping weight low without sacrificing waterproofing.
- Waterproofing: Taped seams and PU-coated ripstop nylon construction, per Alpkit’s published product page.
- Fit: Available in sizes from approximately 25L up to 75L. The elasticated hem and cinch cord provide a snug fit across a range of pack shapes.
- Weight: Approximately 85g for the mid-size option, per Alpkit’s published specifications — making it one of the lightest covers in this guide.
- Packed size: Approximately 10×5cm — genuinely pocket-sized.
- Price: Typically under approximately £15 at Alpkit directly and at Go Outdoors.
Check Price at Alpkit → (affiliate link — see disclosure)
Community Feedback: Alpkit’s rain covers are frequently cited across r/UKhiking and r/camping as the go-to recommendation for budget-conscious hikers who don’t want to sacrifice quality. Owner review consensus highlights the packability and value as standout strengths, with some noting the lighter fabric is less resistant to abrasion against rough rock than heavier alternatives.
Verdict: The best choice for weight-conscious day hikers and fastpackers. If you’re counting grams and don’t need the bulletproof construction of the Ortlieb, this is where to start.
3. Decathlon Forclaz 500 – The Budget Workhorse
Decathlon’s own-brand Forclaz range has earned a strong reputation for delivering functional outdoor kit at accessible prices, and their Forclaz 500 rain cover is a prime example. It won’t win awards for technical sophistication, but it does the core job reliably.
- Waterproofing: PU-coated polyester construction. Decathlon does not publish a hydrostatic head rating for this product; however, the cover features a fully elasticated hem and taped seams, per the Decathlon product specification page, which are the key indicators of reliable waterproof performance at this price point.
- Fit: Sized by rucksack volume. The elasticated hem provides a secure fit and the cover includes reflective strips for low-light visibility — a useful safety feature for trail runners and commuters.
- Weight: Approximately 100g for the mid-size version, per Decathlon’s published specifications.
- Packed size: Approximately 12×8cm.
- Price: Typically under approximately £15 at Decathlon stores and online.
Check Price at Decathlon → (affiliate link — see disclosure)
Community Feedback: Owner reviews on Decathlon’s own platform and across r/camping broadly describe the Forclaz 500 as excellent value for money, particularly for occasional hikers and those new to the outdoors. The reflective detailing is frequently highlighted as a differentiating feature at this price point.
Verdict: The best entry-level rucksack rain cover for occasional hikers, commuters, and anyone wanting reliable protection without spending more than approximately £15.
Frequently Asked Questions
Can I use a bin bag instead of a rucksack rain cover?
In a genuine emergency, a heavy-duty bin bag can provide short-term protection for your pack contents. However, standard bin bags are not UV-resistant, tear easily against abrasion, have no secure attachment system, and will not stay in place in wind. They are also single-use. A purpose-made rucksack rain cover is a worthwhile investment for anyone hiking regularly.
How do I measure my rucksack for a rain cover?
Check your rucksack’s manufacturer-stated volume in litres (this is usually printed on the product label or listed on the manufacturer’s website). Cross-reference this with the cover’s stated compatible volume range. If your pack sits between sizes, size up — a slightly oversized cover can be cinched in with a drawcord, whereas an undersized cover will leave the base of your pack exposed to rain.
Do I need a rain cover if I already use dry bags inside my rucksack?
Internal dry bags protect individual items but leave the main body of your rucksack — and any gear not inside a dry bag — exposed to saturation. A waterlogged pack also becomes significantly heavier. Using both a rain cover and internal dry bags is the most reliable approach for multi-day trips or sustained heavy rain, as recommended by gear writers at Outdoor Gear Lab.
What hydrostatic head rating should I look for in a rucksack rain cover?
For reliable protection in typical UK rain, a hydrostatic head (HH) rating of at least 1,500mm is a useful benchmark. For sustained heavy downpours — such as those common in the Scottish Highlands or the Lake District — 3,000mm or above is preferable. Note that many budget covers do not publish HH ratings; in those cases, look for taped or welded seams and a stated PU coating as alternative quality indicators.
Where can I buy rucksack rain covers in the UK?
Major UK outdoor retailers stocking rucksack rain covers include Cotswold Outdoor, Go Outdoors, Alpkit (direct), and Decathlon. Online options include Amazon UK, where a wide range of sizes and brands are available. Prices range from under approximately £10 for basic covers to around £55–£70 or more for premium welded options such as the Ortlieb Pack.
Affiliate disclosure: Some links in this article are affiliate links. If you purchase through them, we may earn a small commission at no additional cost to you. This does not influence our recommendations.
