Satch Ergonomic Backpack Blackjack pairs an adjustable back system with a 30 L capacity for organized daily use. It's designed for comfortable load distribution and practical on-the-go organization. Key attributes: Black | Nero | PET | Water-repellent exterior | Dirt-resistant material | Reflective strips for visibility | Adjustable back length (140–180 cm) | Adjustable front sternum straps | Headphone port | Expandable external pockets | Mesh pocket on lumbar belt | Optimized internal organization | Padded back panel | External expandable pockets | Mesh lumbar pocket | Multiple compartments for organization | Dimensions & fit: 30 x 45 x 22 cm (L/P/H) | Volume 30 L | Weight 1200 g | Adjustable back length for user heights 140–180 cm | Ergonomic, adjustable fit to support posture and growth | Composition & care: PET