Filters are the most popular method of ensuring water collected in the outdoors is completely safe to drink, and there are a lot of choices from pump filters to gravity filters from respected brands such as MSR and Katadyn, as well as newer brands such as HydroBlu. The lightest option could be chemical treatment though, for example Micropur tablets weigh virtually nothing, the only compromise compared with a filter is they don't remove particulate matter, but if you expect clear water sources such as running rivers then they could be the best option.

  • LifeStraw Peak Series Compact Gravity Water Filter System 3L LifeStraw Peak Series Compact Gravity Water Filter System 3L

    LifeStraw

    Peak Series Compact Gravity Water Filter System 3L

    Weighs
    240g
    Weighs:
    240g
    Hydration Capacity:
    >3.0L

    An extremely durable and high-performance water filtration system from Life Straw. LifeStraw says:  It’s the simple, lightweight and compactible option for back-country camping and backpacking. The optimized filtration cartridge boasts a …

    £79.99
    RRP: £79.99
  • MSR Hyperflow MicroFilter MSR Hyperflow MicroFilter
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    MSR

    Hyperflow MicroFilter

    Weighs
    244g
    Weighs:
    244g

    The MSR HyperFlow Microfilter will change the way you travel in the backcountry. Pumps more than 3 liters per minute or one liter every 20 strokes. MSR says: The HyperFlow microfilter utilizes the latest Hollow Fiber Technology and our most advanced…

    £118.99
    RRP: £139.99 | Save: £21.00
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  • Katadyn Hiker Pro Transparent Water Filter Katadyn Hiker Pro Transparent Water Filter
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    Katadyn

    Hiker Pro Transparent Water Filter

    Weighs
    264g
    Weighs:
    264g (excluding bag)

    The Hiker Pro is a durable water filter that is easy to setup and use. It filters out bacteria and protozoa resulting in great water quality. Versatile attachments and points mean it can be used with other hydration kits such as bladders easily. Kat…

    £99.99
    RRP: £104.99 | Save: £5.00
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  • CamelBak Eddy+ Filtered By Lifestraw 1L Bottle CamelBak Eddy+ Filtered By Lifestraw 1L Bottle

    CamelBak

    Eddy+ Filtered By Lifestraw 1L Bottle

    Weighs
    270g
    Weighs:
    270g
    Capacity:
    1000ml

    A sleek and stylish travel water bottle incorporating a LifeStraw water filter that’s been redesigned for an enhanced performance that now incorporates more recycled materials. CamelBak says:  Eddy® + filtered by LifeStraw® takes …

    £49.99
    RRP: £49.99
  • HydroBlu Go Flow Water Gravity Bag with Versa Flow Water Filter HydroBlu Go Flow Water Gravity Bag with Versa Flow Water Filter
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    HydroBlu

    Go Flow Water Gravity Bag with Versa Flow Water Filter

    Weighs
    270g
    Weighs:
    270g (set)

    The Go Flow Gravity Bag combines the hugely popular Versa Flow filter with a tough, large capacity gravity filter set up. This 10L system is ideal for large groups and use at base camp. HydroBlu says The Go Flow Water Gravity Bag with the Versa Flow…

    £64.99
    RRP: £64.99
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  • GO 2.0 Water Filter Bottle - 1L GO 2.0 Water Filter Bottle - 1L

    LifeStraw

    GO 2.0 Water Filter Bottle - 1L

    Weighs
    272g
    Weighs:
    272g
    Capacity:
    0.5-1.0L

    The LifeStraw Go 2.0 is an excellent portable water filter bottle with a two-stage filtration system that removes bacteria, parasites, microplastics, and impurities from water sources. LifeStraw says:  LifeStraw Go Series is the ultimate sideki…

    £54.99
    RRP: £54.99
  • Katadyn BeFree Gravity Water Filtration System 10L Katadyn BeFree Gravity Water Filtration System 10L
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    Katadyn

    BeFree Gravity Water Filtration System 10L

    Weighs
    284g
    Eco Initiatives:
    BPA Free
    Capacity:
    >3.0L
    Weighs:
    284g

    Lightweight, hands-free water filtration for larger groups. Katadyn says: The sleek, foldable Katadyn BeFree Gravity 6L filter system uses gravity to get the freshest, cleanest water you can trust. The heart of the BeFree Gravity 6L is the EZ-Clean..…

    £149.99
    RRP: £159.99 | Save: £10.00
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  • Currently out of stock
    Sawyer International Select S3 Foam Water Filter and Purifier Sawyer International Select S3 Foam Water Filter and Purifier

    Sawyer International

    Select S3 Foam Water Filter & Purifier

    Weighs
    284g
    Weighs:
    284g

    Advanced water filtration made easy - The Select S3 filters and purifies water of chemicals, pesticides, bacteria, protozoa, viruses and heavy metals in just 10 seconds as well as improving taste and odors.  Sawyer International says Enjoy safe…

    £142.99
    RRP: £154.99 | Save: £12.00
  • Sawyer International Select S1 Foam Water Filter Sawyer International Select S1 Foam Water Filter
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    Sawyer International

    Select S1 Foam Water Filter

    Weighs
    284g
    Weighs:
    284g

    Advanced water filtration made easy - The Select S1 filters water of chemicals, pesticides, bacteria, and protozoa in just 10 seconds as well as improving bad taste and odors.  Sawyer International says Enjoy safe, clean water anywhere in the w…

    £89.99
    RRP: £104.99 | Save: £15.00
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  • Platypus Gravityworks 2.0L Water Filter - Complete Kit Platypus Gravityworks 2.0L Water Filter - Complete Kit
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    Platypus

    Gravityworks 2.0L Water Filter - Complete Kit

    Weighs
    332g
    Weighs:
    332g

    The GravityWorks 2.0L system holds up to four liters (depending on configuration), is light weight and packs small, making it ideal for 2-4 people in the backcountry. Platypus says: An ultralight and versatile water filter that makes it easy to treat…

    £109.99
    RRP: £124.99 | Save: £15.00
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  • MSR AutoFlow XL Gravity Water Filter MSR AutoFlow XL Gravity Water Filter
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    MSR

    AutoFlow XL Gravity Water Filter

    Weighs
    350g
    Weighs:
    350g (complete kit)

    The high-volume MSR AutoFlow XL Gravity Filter 10 L provides fast, no-pump water filtration for basecamps and extended stays in the backcountry, with fewer trips to haul water back to camp. MSR says Fast, high-volume water filtration for groups and.…

    £105.99
    RRP: £124.99 | Save: £19.00
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  • Platypus Gravityworks 4.0L Water Filter System Platypus Gravityworks 4.0L Water Filter System
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    Platypus

    Gravityworks 4.0L Water Filter System

    Weighs
    370g
    Weighs:
    370g

    Delivering four liters of filtered water is just 2.5 minutes with no pumping, there’s simply no easier or faster way to get safe water away from home. Ideal for bigger groups, the system’s eight-liter capacity eliminates both the worry an…

    £119.99
    RRP: £139.99 | Save: £20.00
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  • Platypus Gravityworks 6.0L Water Filter System Platypus Gravityworks 6.0L Water Filter System
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    Platypus

    Gravityworks 6.0L Water Filter System

    Weighs
    372g
    Weighs:
    372g (excludes bag)

    Filtering up to 1.75 liters a minute without any pumping there’s simply no easier or faster way to get safe water away from home. Ideal for bigger groups, the system’s eight-liter capacity eliminates both the worry and hassle of keeping..…

    £134.99
    RRP: £159.99 | Save: £25.00
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  • HydroBlu MUV Backcountry Pump Water Filter HydroBlu MUV Backcountry Pump Water Filter
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    HydroBlu

    MUV Backcountry Pump Water Filter

    Weighs
    394g
    Weighs:
    394g

    The MUV Backcountry filter is a versatile water pump that uses a combination of hollow fibre and activated carbon to make water safe. This versatile kit can be set up in a number of ways for solo through to group use. HydroBlu says The Backcountry i…

    £89.99
    RRP: £89.99
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  • LifeStraw Mission 5L Gravity Water Filter and Purifier LifeStraw Mission 5L Gravity Water Filter and Purifier
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    LifeStraw

    Mission 5L Gravity Water Filter & Purifier

    Weighs
    418g
    Eco Initiatives:
    BPA Free
    Weighs:
    418g

    A hight volume, microbiological gravity water purifier Lifestraw says High-Volume Gravity Water Filter and Purifier. Protects against viruses, bacteria, parasites, dirt, sand, and cloudiness. Independently lab tested, durable and BPA Free. Every fill…

    £134.99
    RRP: £134.99
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  • MSR MiniWorks EX Water Filter MiniWorks EX Water Filter
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    MSR

    MiniWorks EX Water Filter

    Weighs
    456g
    Weighs:
    456g

    UOG TOP PICK - MiniWorks EX Water Filter Its durable ceramic element ensures protection pumps water for years and can be cleaned repeatedly for full recovery with no tools required for complete disassembly - Hardcore, durable, water filtration, …

    £118.99
    RRP: £139.99 | Save: £21.00
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  • MSR Guardian Gravity Water Purifier MSR Guardian Gravity Water Purifier
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    MSR

    Guardian Gravity Water Purifier

    Weighs
    472g
    Weighs:
    472g (excluding pouch)

    The MSR Guardian Gravity Purifier delivers high volumes of purified, virus-free water on-demand virtually anywhere on Earth. One of the best available filters no matter where you are or how bad the conditions may be. MSR says Using the advanced...

    £254.99
    RRP: £299.99 | Save: £45.00
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  • MSR Trail Base Water Filter Kit MSR Trail Base Water Filter Kit

    MSR

    Trail Base Water Filter Kit

    Weighs
    472g
    Weighs:
    472g (set)

    The MSR Trail Base Water Filter Kits can be easily transformed from a trail filter into a gravity system which makes it perfect for adventurers who explore the backcountry in multiple ways. MSR says To meet the needs of multi-activity backcountry..…

    £122.99
    RRP: £144.99 | Save: £22.00
  • MSR Guardian Water Purifier Pump MSR Guardian Water Purifier Pump
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    MSR

    Guardian Water Purifier Pump

    Weighs
    490g
    Weighs:
    490g

    The MSR Guardian Purifier Pump is the world's most advanced backcountry purifier, designed to to be the safest and easiest way to purify water anywhere on earth.  MSR says:  Nothing is safer or easier to use for purifying the most demandin…

    £334.99
    RRP: £394.99 | Save: £60.00
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  • Peak Series Gravity Water Purifier System 8L Peak Series Gravity Water Purifier System 8L
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    LifeStraw

    Peak Series Gravity Water Purifier System 8L

    Weighs
    721g
    Weighs:
    721g (ex bag)
    Capacity:
    >3.0L

    We're working out what we think - we'll add our view here!  LifeStraw says:  The LifeStraw Peak Series Gravity Water Purifier is a portable, high-capacity water purification system that removes viruses, in addition to bacteria, parasites an…

    £184.99
    RRP: £199.99 | Save: £15.00
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