I have a bunch of these but they tend to get a bit slimy inside. What is the best way to clean them?

We suggest using Bottle Bright to help clean your soft flask. https://www.amazon.com/Bottle-Bright-Tablets-Biodegradable-Hydration/dp/B06XYCVDB9/ref=sr_1_4?hvadid=616928149387&hvdev=c&hvlocphy=9028880&hvnetw=g&hvqmt=e&hvrand=2863089430132798370&hvtargid=kwd-12313741154&hydadcr=9377_13604253&keywords=bottle+bright&qid=1693921708&sr=8-4

Will they take a Katadyn BeFree filter?

Haven't tried putting the filter in, but I carry the BeFree collapsable water filter and flask with me on most of my runs, hikes, and long gravel rides. It folds up easy and weighs nothing. I have been doing this for years. Very fortunate to live in Washington where there is clean, clear water on most of the trails & mountain gravel roads up here.

osprey duro 15, will it fit the front pockets?

Hi there! Our flasks and reservoirs will fit most running vests. Please see below dimensions and compare to that of your running vest to see if they are compatible. Dimensions: 7.3 x 2.3 in

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💦 Stay ahead of the pack with hydration that moves as fast as you do!

CUSTOMIZABLE HYDRATION - Choose between straw or bite valve for personalized sipping comfort.
SEAMLESS COMPATIBILITY - Designed to snugly fit hydration vests, belts, and running backpacks without friction.
LIFETIME ADVENTURE GUARANTEE - Backed by a repair or replacement promise to keep you fueled on every run.
ULTRA LIGHT ULTRA FLEXIBLE - Weighs just 46g and collapses as you drink to minimize bounce and bulk.
SPEED FILL CAP FOR LIGHTNING REFILLS - One-click open/close design lets you hydrate fast at aid stations or on the move.

The Hydrapak UltraFlask Speed 500 ml pack of 2 offers ultra-lightweight, collapsible hydration designed for runners and outdoor enthusiasts. Featuring a quick-access SpeedFill cap and customizable valve options, it fits seamlessly into hydration vests and packs, reducing bounce and bulk. Built for durability and backed by a lifetime warranty, it’s the ultimate companion for fast-paced adventures.

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Product Dimensions	5.08 x 5.08 x 21.59 cm; 200 g
Specific uses	Running, Hiking, Traveling, Everyday use
Item volume	500 Milliliters
Is mould resistant	en_AE
Finish types	Glossy
Care instructions	Hand Wash Only
Batteries required	No
Included components	Bottle+ Straw
Import designation	Imported

Hydrapak UltraFlask Speed 500 ml Pack of 2 - Collapsible Water Bottle for Hydration Vests and Running Backpacks with Easy Open Cap (500 ml), Malibu Blue

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