Mountain Hardwear Summit Rocket 30 Backpack - SS16 Nylon Imported Compression Molded Backpanel - Comfortable, sheds snow and ventilates. HardWave Framesheet - Provides comfortable carry, but is removable to reduce weight. Large Zip Top - Provides easy access to main compartment. Versatile Compression System - Secures climbing gear and overloads, but can be removed to reduce weight when not needed. Zippered Top Pocket - Keeps smaller gear handy.