Combining clever design with the latest innovative materials, the Source Widepac Hydration System 3L is a state of the art pack bladder that is easy to use and maintain. The BPA free Taste Free™ PE film keeps water tasting fresh for weeks without any plastic flavour. To reduce maintenance, the Grunge-Guard™ anti-microbial agent inhibits bacteria growth and the Glass Like™ polyethylene film which is 2000% smoother than normal TPU films prevents the build-up of bio-film.A larger than normal opening with a patented slide enclosure gives easy access for filling and cleaning and provides a strong airtight seal. This versatile pack bladder is also fully compatible with the SQC™ system allowing a wide variety of filters, valves and other assorted hydration accessories to be fitted. A cleverly designed bite valve with an integrated dust cover and twist action shut off completes the package. The Source Widepac Hydration System is at the cutting edge of design and functionality and a must have for the serious outdoors person.