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The camelbak LUXE is a great hydration system. I use it on day hikes, cycling, at amusement parks, and on camping trips. The men's version is called the MULE. One notable difference is the softness of the shoulder straps. The women's version has soft fleece like covering on the shoulder straps, so it stays comfortable when wearing a tank top.
CamelBak Women's Luxe 100 oz Hydration Pack - @ campmor.com $60