SnowShield Fabric: Repels snow and moisture to keep gear dry in winter conditions Crux Reservoir: 70oz capacity delivers more water per sip with ergonomic handle and insulated tube protection Therminator Harness: Insulated sleeve in the shoulder strap protects the drinking tube from freezing Tri-Zip Access: Three-zipper design allows quick access to gear at any level of the pack Ski Carry and Expansion Panel: External straps support A-frame ski carry and an expansion panel adds extra storage when needed