The Granite Gear Virga3 55 Women's is a frameless backpack built for multi-day trekking and thru-hiking, with 55 litres of capacity at 760 g — about 13.8 g per litre, a light figure that comes from skipping an internal frame. A removable, padded hip belt (fitting 61-102 cm) and a chest strap help transfer some load to the hips, but the pack's rated maximum is 11 kg, so it depends on you keeping the overall kit light rather than a stiff frame doing the work.
Being frameless means the pack needs to be packed carefully — a soft sleeping pad or rolled clothing against the back panel gives it structure, and an unevenly loaded pack will sag and feel less stable on the trail. The women's-specific fit adjusts the harness and hip belt sizing rather than just resizing a unisex pack.
This suits thru-hikers and multi-day trekkers who have already trimmed their base weight down near or under the 11 kg ceiling; anyone carrying heavier food, water, or winter gear will find the frameless construction and hip belt less supportive than a stayed pack.