The TERG Daypack The Other Day Backpack is 25L backpack built for commuting, city use, or short trips, with multiple pockets and room to organize your belongings. Made from the same material once used in bulletproof jackets worn by airborne troops in World War II—and still trusted in motorcycle wear today—The Other Day delivers exceptional durability. TERG is Helinox’s independent brand for bag design, born from a simple principle: create what satisfies us first. The name comes from the initials of Trial and Error Research Group, where every feature, shape, and hidden function is continuously refined, resulting in bags with thoughtful details and unique sensibilities.