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.

  • Katadyn BeFree Gravity Water Filtration System 6L Katadyn BeFree Gravity Water Filtration System 6L
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    Katadyn

    BeFree Gravity Water Filtration System 6L

    Weighs
    224g
    Eco Initiatives:
    BPA Free
    Hydration Filters:
    Capacity 1.0 - 2.0L, Soft & Flexible
    Weighs:
    224g

    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..…

    €141,44
    RRP: €153,74 | Save: €12,30
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    HydroBlu MUV Nomad Water Filter HydroBlu MUV Nomad Water Filter

    HydroBlu

    MUV Nomad Water Filter

    Weighs
    230g
    Weighs:
    230g
    Capacity:
    700ml

    The MUV Nomad gives you a handy and practical bottle design with a serious water filter inside. The MUV filter is a compact Nanalum filter capable of dealing with heavy metals, chemicals, bacteria, viruses and sediment. HydroBlu says Virus and bacte…

    €50,42
    RRP: €50,42
  • QuickDraw 3L Gravity Filter System QuickDraw 3L Gravity Filter System
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    Platypus

    QuickDraw 3L Gravity Filter System

    Weighs
    233g
    Weighs:
    233g (ex bag)
    Capacity:
    2.01-3.0L

    The Platypus QuickDraw 3L Gravity Filter is a high-performance water filter that removes 99.9999% of bacteria and 99.9% of protozoa. It can be used as a traditional gravity filter or converted to a squeeze filter. Platypus says:  The...

    €98,39
    RRP: €104,54 | Save: €6,15
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  • Platypus GravityWorks 2.0L System - Bottle Kit Platypus GravityWorks 2.0L System - Bottle Kit
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    Platypus

    GravityWorks 2.0L System - Bottle Kit

    Weighs
    236g
    Weighs:
    236g (set)

    The GravityWorks 2.0L System - Bottle Kit allows you to filter 2 litres of water without pumping, straight into your water bottle or hydration reservoir. Platypus says The minimalist GravityWorks 2.0L Bottle Kit system is both ultralight and...

    €104,54
    RRP: €147,59 | Save: €43,05
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  • 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 …

    €98,39
    RRP: €98,39
  • 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…

    €146,36
    RRP: €172,19 | Save: €25,83
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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…

    €122,99
    RRP: €129,14 | Save: €6,15
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  • 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…

    €79,94
    RRP: €79,94
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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…

    €67,64
    RRP: €67,64
  • 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..…

    €184,49
    RRP: €196,79 | Save: €12,30
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  • Sawyer International Select S3 Foam Water Filter and Purifier Sawyer International Select S3 Foam Water Filter and Purifier
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    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…

    €175,88
    RRP: €190,64 | Save: €14,76
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  • 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…

    €110,69
    RRP: €129,14 | Save: €18,45
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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.…

    €130,37
    RRP: €153,74 | Save: €23,37
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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…

    €110,69
    RRP: €110,69
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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…

    €166,04
    RRP: €166,04
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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, …

    €146,36
    RRP: €172,19 | Save: €25,83
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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...

    €313,64
    RRP: €368,99 | Save: €55,35
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  • 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…

    €412,04
    RRP: €485,84 | Save: €73,80
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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

    The LifeStraw Peak Series Purifier is a powerful portable water filtration system for camping and group travel. It can produce up to 30 litres of clean water per hour without pumping or power. LifeStraw says:  The LifeStraw Peak Series Gravity.…

    €227,54
    RRP: €245,99 | Save: €18,45
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