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.. . Hydroguard?? technology inhibits the growth of bacteria in the tube. 100% free of BPA, BPS and BPF. 20% more water per sip. BPA/BPS/BPF Free: Yes. Dimensions: 99 cm / 39 in. long. Material: Polypropylene. Imported.