This reservoir with Thermal Control insulation turns any pack into an all-season 100-ounce hydration system.

Features:

- The Crux Reservoir delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks.
- 10mm closed cell foam reservoir insulation
- Insulated tube and bite valve cover
- Attachment points
- Large adjustable carry loop