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. Works with all Camelbak Crux reservoirs; not compatible with Antidote and Omega reservoirs Hydroguard antimicrobial technology inhibits the growth of bacteria on tube surfaces, does not protect user from bacteria or other disease-causing organisms. Best Use: Multi-sports Weight 1.5 ounces Made in USA