Satch PACK Ergonomic Backpack is designed for daily school use, combining an adjustable back system with roomy, organized storage for books and tech. Key attributes: Black | Multicolor | Polyester | Water-repellent | Dirt-resistant | PFC-free water-repellent coating | REACH compliant | Adjustable back length (1.40–1.80 m) | Adjustable front/chest straps | Headphone port | Mesh pocket on lumbar belt | Optimized internal organization | Ergonomic silhouette | Reflective strips for visibility | Expandable external pockets | Dimensions & fit: 30 x 45 x 22 cm (L/P/H) | Weight 1200 g | Volume 30 liters | Adjustable back length: 1.40 m to 1.80 m | Ergonomic back panel for structured support | Adjustable front/chest straps and lumbar belt for weight distribution | Composition & care: Polyester (PET) | Water-repellent coating