Here's what other sites are saying:
Use the CamelBak All Clear(TM) 500-micron pre-filter to remove large contaminants from water before using the All Clear water purifier (sold separately).
Camelbak All Clear Pre Filter FEATURES of the CamelBak All Clear Pre Filter Strains out larger sediment particles prior to purification with All Clear Protects bottle threads from untreated water
The All Clear Pre-Filter works with your CamelBak All Clear Purifier to take tap or naturally found water and works to remove all microbial particles that may be in the water. The 500 nylon screen of the Pre-Filter works to quicky purify your water, ensuring you stay hydrated no matter where you are. PRODUCT FEATURES: 500 Micron nylon screen quickly and effectively filters out larger sediment and particulates Frame mounts securely over the bottle threads and helps to protect them from untreated water when dunking in rivers, streams, etc.
- Appalachian Outdoors
The CamelBak All Clear Pre-Filter strains out larger particles before you treat your water with the CamelBak All Clear UV Water Bottle. Removing sediment not only makes the water more pleasant to drink, it makes it easier for the UV light to move throughout the water for fully effective treatment. 500 Micron nylon screen pulls out larger particulates without slowing filling down too much. Mounts securely on the bottle's threads to protect them from untreated water when dunking in rivers, lakes and streams. A must-have accessory for the All-Clear UV treatment water bottle system. Filter size: 500 micron. Filter type: Nylon screen. Does not filter microbes, water still needs to be treated
- Tahoe Mountain Sports
Before you use your Camelbak All Clear ultraviolet system to zap the micro-organisms out of your freshly-gathered water, get rid of any solid particles with this compatible pre-filter.