The Oveja Negra Gearjammer Seat Bag in Black is a durable and lightweight bikepacking accessory designed to securely store gear during day rides or extended trips. Constructed from waterproof materials, it features a roll-top design allowing for adjustable capacity, with the medium size accommodating 4 to 10 liters and the large size holding 6 to 12 liters. The bag includes exterior compression straps for load stabilization, a high-density polyethylene (HDPE) frame sheet to maintain shape, and Superfabric Grip for a stable seat post attachment. Weighing approximately 12.2 ounces for the medium and 12.6 ounces for the large, the Gearjammer is made in the USA from domestic and imported materials.