The CamelBak Crux replacement tube has larger diameter and offers more water per sip than previous tubes. Pair with the Crux reservoir on/off valve (sold separately) for 20% more water flow per sip. It works with all Camelbak Crux reservoirs except for the Antidote and Omega reservoirs. It is recommended you clean your reservoir and tube with hot water and a mild soap, however Hydroguard antimicrobial technology can inhibit the growth of bacteria on tube surfaces.