compact size and profile - dimensions: 30 cm x 16 cm x 45 cm (11.8 in x 6.3 in x 17.7 in) - generous interior space while maintaining a compact appearance - suitable for both business and casual daily use roll top design with adjustable height and capacity - roll-top closure allows you to adjust the bag height and storage capacity as needed - expandable capability up to 25 cm to accommodate more items when required waterproof and durable material - made from Oxford fabric - waterproof and scratch resistant for everyday reliability practical use scenarios - daily commute: carry documents, notebooks, and personal items with ease - business or school: flexible capacity adapts to changing load without bulk - weekend travel or gym: expand storage to accommodate clothing and gym gear why this bag stands out - compact yet adaptable design that scales with your needs - reliable materials and construction for day-to-day use - clear emphasis on function, size, and performance for practical, confident carry notes - measurements are provided in both centimeters and inches for reference - specific internal features such as pockets or sleeves are not described, focusing on overall size, material, and the roll-top versatility