Zpacks Sub-Nero Ultra 30L Backpack Zpacks Sub-Nero Ultra 30L Backpack Used only for one night and two days. Weight: 297 g Material: Ultra 100 Color: Blue This is a 30L frameless backpack from Zpacks. The Sub-Nero Ultra is a smaller, streamlined version of the popular Nero Ultra, featuring only the most essential functions. ● The Ultra used in the Sub-Nero is a fabric woven and laminated with UHMWPE / Ultra-High Molecular Weight Polyethylene. It boasts extremely high abrasion resistance and tear strength, making it the strongest fabric offered by Zpacks. It uses hydrophobic threads, and all seams are seam-sealed, providing high water resistance. ● The roll-top prevents water from entering and allows for compression when the load is light. ● The large center mesh pocket makes it easy to see the items inside and is convenient for drying wet items or storing items you want to access quickly. ● A 28 x 39.4cm / 28g sit pad is secured to the back with shock cords, making it easy to attach and detach. This pad also reduces shock to the back. ● The side pockets are designed to hold 1-1.5L bottles. Umbrellas and trekking poles also fit. Easy to take out without unloading your luggage. ● The shoulder straps use cushioned 3D mesh. Daisy chains are included, allowing you to attach shoulder pouches (sold separately) and water bottle sleeves (sold separately), etc. ● When folded, it becomes small enough to fit in a size L / 1-gallon Ziploc bag. 【Materials】 Main Body: 3.3oz/sqyd Ultra 100 (Water resistance 20,000mm) Back Panel: 5.0oz/sqyd Lycra® Mesh Shoulder Straps: 5.3oz/sqyd 3D Spacer Mesh 【Size】 Overall: 14 x 25 x 48cm Capacity: Total 30L (Main 17L / Each side pocket 2.5L / Center pocket 8L) Weight: 275g (Backpack 247g / Sit pad 28g) Recommended Load Capacity: Up to approximately 9kg