Feature 1. Ultra-light aluminum frame 2. The front and bottom inner zipper compartments can separate dirty or wet items. 3. Semi-circular zipper pocket on the lower front panel. 4. Elastic mesh pockets on both sides can hold water bottles, etc. 5. Shrink band to compress the main bag. 6. The ax buckle can be used to hang ice axes, hiking poles, etc. 7. The side pockets are made in accordion style to increase the capacity. 8. There are small pockets on both sides of the belt for storing commonly used items such as tissues. 9. Breathable mesh back. 10. Rain cover at the bottom of the bag. 11. Thickened cotton-filled “S”-shaped arm straps and three-dimensional waistband, comfortable and weight-saving.