The Osprey Sylva Women's hydration pack delivers everything that’s ever been expected from a top-tier bike pack plus an AirSpeed™ back panel that transfers weight to the hips. When you're riding, you don't want to think about your pack, and the Sylva's streamlined profile does exactly that no matter how you pedal. The Sylva delivers maximum ventilation and hydration. It's the perfect option for desert heat or inescapably humid climes.