Water Filter Accessories
Guyot Designs TapGuard- Price: $14.95
- (30 Reviews)
CamelBak Filter Adapter- Price: $7.00
- (12 Reviews)
Katadyn Carbon Cartridge- Price: $19.95
- (3 Reviews)
SteriPEN Water Bottle Prefilter- Price: $12.95
- (3 Reviews)
MSR SweetWater SiltStopper Replacement Filters- Price: $19.95
MSR SweetWater SiltStopper- Price: $19.95
- (10 Reviews)
SteriPEN FitsAll Filter- Price: $14.95
CamelBak All Clear Pre-Filter- Price: $15.00
- REI Exclusive!
MSR Water Filter Maintenance Kit- Price: $19.95
- (4 Reviews)
MSR HyperFlow Maintenance Kit- Price: $19.95
Platypus GravityWorks/CleanStream Hose Kit- Price: $15.95
Still can't find what you're looking for? Contact us for further assistance.
How are we doing? Give us feedback on this page.
FREE U.S. STANDARD SHIPPING No minimum purchase!
-
Camp & Hike
- GEAR
- Car Camping Mattresses
- Backpacks
- Bivy Sacks
- Camp Furniture
- Sleeping Bags
- Sleeping Pads
- Stuff Sacks
- Tents & Shelters
- Water Bottles
- Water Treatment
- All Camp/Hike Gear
- GADGETS AND ELECTRONICS
- Binoculars
- Camp Tools
- Compasses
- Electronics
- Flashlights
- GPS
- Headlamps
- Knives
- Lanterns
- Radios
- All Gadgets and Electronics
- CAMP KITCHEN
- Coffee
- Cookware
- Coolers
- Cups and Mugs
- Food
- Plates and Bowls
- Stoves
- Tables
- Utensils
- Water Storage
- All Camp Kitchen
-
Climb
- CLIMBING GEAR
- Ascenders
- Belay/Rappel
- Carabiners
- Climbing Chalk
- Climbing Harnesses
- Climbing Helmets
- Climbing Holds
- Climbing Packs
- Crash Pads
- Rock Protection
- Pulleys
- Quickdraws
- Rock Climbing Shoes
- Ropes
- Caving and Canyoneering
- Webbing and Cord
- Slings and Runners
- Slacklines
- All Climbing Gear
- SNOW AND ICE
- Avalanche Safety
- Crampons
- Glacier Glasses
- Ice Axes
- Ice Tools
- Mountaineering Boots
- Snow and Ice Protection
- All Snow and Ice
-
Cycle
- BIKES
- Cruiser Bikes
- Comfort Bikes
- Folding Bikes
- Kids' Bikes
- Hybrid Bikes
- Mountain Bikes
- Road Bikes
- Urban Bikes
- All Bikes
- CLOTHING/HELMETS
- Cycling Gloves
- Cycling Helmets
- Cycling Jackets
- Cycling Jerseys
- Cycling Shoes
- Cycling Shorts
- Cycling Socks
- Cycling Tights & Pants
- Arm/Leg Warmers
- All Cycling Clothes
- BIKE ACCESSORIES
- Bike Computers
- Bike Lights
- Bike Locks
- Bike Pumps
- Bike Racks
- Bike Trailers
- Bike Trainers
- Hydration
- Panniers/Bike Bags
- All Bike Accessories
-
Fitness
- FITNESS CLOTHING
- Men's Running Clothing
- Men's Swimming
- Men's Triathlon Clothing
- Women's Running Clothing
- Women's Swimming
- Women's Triathlon Clothing
- Women's Yoga Clothing
- All Fitness Clothing
- FITNESS FOOTWEAR
- Men's Cross-Training Shoes
- Men's Road-Running Shoes
- Men's Trail Running Shoes
- Women's Cross-Training Shoes
- Women's Road-Running Shoes
- Women's Trail Running Shoes
- All Fitness Footwear
- FITNESS GEAR
- Energy Food
- Exercise Equipment
- GPS Sports Watches
- Gym Bags
- Heart Rate Monitors
- Hydration
- Pedometers
- Running Packs
- Strollers
- All Fitness Gear
- FITNESS SHOPS
- Cycling Shop
- Running Shop
- Swimming Shop
- Triathlon Shop
- Yoga Shop
-
Run
- MEN'S RUNNING CLOTHES
- Men's Running Shirts
- Men's Running Shorts
- Men's Pants and Tights
- Men's Running Hats
- Men's Running Jackets
- Men's Running Socks
- Men's Running Gloves
- All Men's Running Clothes
- WOMEN'S RUNNING
- Women's Running Shirts
- Women's Running Shorts
- Women's Pants and Tights
- Women's Running Hats
- Women's Running Jackets
- Sports Bras
- Women's Running Socks
- Women's Running Gloves
- All Women's Running Clothes
- RUNNING SHOES
- Men's Cross-Training Shoes
- Men's Road Running Shoes
- Men's Trail Running Shoes
- Men's Minimalist Running Shoes
- Women's Cross-Training Shoes
- Women's Road Running Shoes
- Women's Trail Running Shoes
- Women's Minimalist Running Shoes
- All Running Footwear
-
Paddle
- KAYAKING
- Kayaks
- Cockpit Covers
- Kayak Accessories
- Kayak Carts
- Kayak Paddles
- Safety Equipment
- Spray Skirts
- CANOEING
- Canoes
- Canoe Paddles
- Canoe Packs
- Canoe Accessories
- PADDLEBOARDING
- Paddleboards
- Paddleboard Paddles
- CLOTHING AND PFDs
- Dry Suits
- Paddling Footwear
- Paddling Gloves
- Paddling Jackets
- PFDs
- Rashguards
- Wetsuits
- All Paddling Clothing
-
Snowsports
- DOWNHILL SKIING
- Downhill Skis
- Downhill Ski Bindings
- Downhill Ski Boots
- Ski Bags
- Ski Goggles
- Ski Helmets
- Ski Packs
- Downhill Ski Poles
- Men's Downhill Ski Clothing
- Women's Downhill Ski Clothing
- Gloves, Hats and Socks
- All Downhill Skiing
- XC AND BACKCOUNTRY
- Cross-Country Skiing
- Backcountry Skiing
- Nordic Touring
- Metal-Edge Touring
- Race/Performance Skiing
- Cross-Country Ski Tuning
- Cross-Country Ski Waxes
- Men's XC Clothing
- Women's XC Clothing
- Kids' XC Ski Gear
- All Cross-Country
- All Tele/Randonee
- SNOWBOARDING
- Snowboards
- Snowboard Bags
- Snowboard Bindings
- Snowboard Boots
- Snowboard Goggles
- Snowboard Helmets
- Snowboard Packs
- Stomp Pads
- Men's Snowboard Clothing
- Women's Snowboard Clothing
- Gloves, Hats and Socks
- All Snowboarding
-
Travel
- LUGGAGE
- Carry-On Luggage
- Travel Packs
- Wheeled Backpacks
- Wheeled Duffels
- Wheeled Luggage
- Kids' Luggage
- Bike Travel Cases
- Ski Bags
- All Luggage
- DAY BAGS
- Camera Bags
- Daypacks
- Duffel Bags
- Handbags
- Laptop Bags
- Messenger Bags
- Shoulder Bags
- Travel Totes
- All Day Bags
- PACKING
- Luggage Locks
- Luggage Tags
- Organizers
- Packing Cubes
- Packing Folders
- Pouches
- Electronics Cases
- Toiletry Kits
- All Packing
-
Men
- MEN'S JACKETS
- Casual Jackets
- Down Jackets
- Fleece Jackets
- Insulated Jackets
- Rain Jackets
- Running Jackets
- Wind Shells
- Ski Jackets
- Snowboard Jackets
- Soft Shell Jackets
- All Men's Jackets
- MEN'S CLOTHING
- Pants
- Shirts
- Shorts
- Sweaters
- Swimming
- Underwear
- Vests
- Footwear
- Tall Clothing
- All Men's Clothing
- MEN'S ACCESSORIES
- Balaclavas
- Bandanas
- Belts
- Gaiters
- Gloves and Mittens
- Hats
- Headwear
- Socks
- Sunglasses
- Watches
- All Accessories
-
Women
- WOMEN'S JACKETS
- Casual Jackets
- Down Jackets
- Fleece Jackets
- Insulated Jackets
- Rain Jackets
- Running Jackets
- Wind Shells
- Ski Jackets
- Snowboard Jackets
- Soft Shell Jackets
- All Women's Jackets
- WOMEN'S CLOTHING
- Footwear
- Pants
- Shirts
- Shorts
- Skirts and Dresses
- Sweaters
- Swimming
- Underwear
- Vests
- Petite Clothing
- Plus Sizes
- All Women's Clothing
- WOMEN'S ACCESSORIES
- Belts
- Gaiters
- Gloves and Mittens
- Hats
- Headwear
- Scarves
- Socks
- Sports Bras
- Sunglasses
- Watches
- All Accessories
-
Kids
- KIDS' SHOPS
- Boys' Clothing
- Girls' Clothing
- Infant & Toddler Clothing
- Kids' Outerwear
- Kids' Shoes
- Kids' Ski Clothing
- Kids' Snowboard Clothing
- Eco-Conscious
- All Kids'
- ACCESSORIES
- Hats
- Gloves and Mittens
- Socks
- Sunglasses
- Toys
- Underwear
- Water Bottles
- All Kids' Accessories
-
Footwear
- MEN'S FOOTWEAR
- Men's Boots
- Men's Sandals
- Men's Shoes
- Men's Slippers
- Men's Wide Sizes
- Men's Socks
- WOMEN'S FOOTWEAR
- Women's Boots
- Women's Sandals
- Women's Shoes
- Women's Slippers
- Women's Narrow Sizes
- Women's Wide Sizes
- Women's Socks
- KIDS' FOOTWEAR
- Kids' Boots
- Kids' Sandals
- Kids' Shoes
- Kids' Slippers
- Kids' Socks
- FOOTWEAR ACCESSORIES
- Gaiters
- Insoles
- Laces
- Treatments
- Winter Traction
-
All
- Backcountry Skiing Shop
- Backpacks
- Binoculars
- Bikes
- Books and Maps
- Camping and Hiking
- Car Racks
- Climbing
- Cross-Country Skiing
- Cycling
- Dog Gear
- Downhill Skiing Shop
- Electronics
- Fitness
- Gift Cards
- GPS
- Hammocks
- Helmet Cams
- Jackets
- Kids'
- Luggage and Day Bags
- Men's Clothing
- Sale & Clearance
THE REI WINTER CLEARANCE: SAVE UP TO 50% On selected ski, snowboard and end-of-season clothing & gear. Shop early for the best deals
- REI Gift Cards
- Buy now!
- Check your REI gift card balance
- REI Membership
- REI member benefits include an annual refund (typically 10% on eligible purchases).
- Join REI today!
- Sign up for REI Gearmail®
- and get 15% off selected items!
- Store Locator
- Locate an REI store near you.
-
- Company Info
- About REI
- Jobs at REI
- 100% Satisfaction Guarantee
- Corporate & Group Sales
- Privacy Policy
- Terms of Use
- Site Rules
- California Transparency in Supply Chains Act - REI's Disclosure
- REI Membership
- Become an REI Member
- Member Help
- Find Membership Number
- Dividend Lookup
- Apply for an REI Visa® Card
- Manage Your REI Visa® Card
- We Care
- REI Gives
- Stewardship
- Volunteer
- Eco-Conscious Gear
- Expert Outdoor Advice
- Expert Advice Articles
- Outdoor Videos
- REI Outdoor School
- Store Events
- Online Affiliate Program
- Become an REI Affiliate
- Gift Registry
- Shop all Brands
- Shop all Categories