Zpacks Nero Classic Backpack

The Zpacks Nero Classic is a 30-litre frameless backpack weighing 281 g, around 9.4 g per litre — light even by ultralight standards. The body is Ultra 100X fabric, waterproof and seam-sealed, so the pack itself sheds rain without a separate cover, though the frameless design means the load itself has to hold the pack's shape. Zpacks lists it for day hikes through multi-day trekking and thru-hiking, spanning short outings to extended trips, provided you're comfortable with a frameless build and packing carefully to keep the pack from collapsing against your back. Anyone wanting a structured frame for heavier, bulkier loads should look at Zpacks' framed options instead.