Camelbak designed the Women's Spark 10 LR Pack for light and fast rides.
1 - Made from Ultra-light materials
2 - Lumbar reservoir compression, lower centre of gravity. Has the usual Camelbak's lifetime warranty.
3 - Bike tool organizer pocket, stretch overflow storage. I've seen pics of it being used to carry an XC helmet.
4 - Women 'fit'. Means it would also work well for guys under 1.7m.
It's brand new, bought extra when I got 1 for my daughter. Same black / amber colour as in the pic. Priced for quick sale.