Patagonia Black Hole MLC Pack 45L is a durable travel backpack designed for organized packing and easy transit. Its padded laptop compartment, multiple internal organizers and convertible carrying options make it suitable for air travel and daily use. Key attributes: Weathered stone | Polyester ripstop | Water-resistant with TPU-film laminate | Durable construction | Meets most carry-on size requirements | Padded laptop sleeve for most 15" devices with document/cable storage | Multiple internal organizer pockets | Three carrying options: backpack, shoulder bag, duffel | Padded waist belt that converts to a single-shoulder strap | Soft-sided suitcase design | Top grab handle and rear trolley sleeve | Drop-in top pocket and external lash points | Laptop carrier zips open and lies flat for access | Dimensions & fit: Height: 56 cm | Width: 37 cm | Depth: 19 cm | Carry-on compatible (meets most airline carry-on requirements) | Convertible carrying: backpack, shoulder bag or duffel | Laptop sleeve fits most 15" laptops | Composition & care: Body: 100% polyester (300-denier ripstop) with TPU-film laminate | Lining: 100% polyester (200-denier plain weave) with PU coating | Shoulder straps and hip belt: 100% polyester airmesh | Webbing: 100% nylon | Hand wash; do not bleach; drip dry; do not iron; do not dry clean.