The Free on Board Backpack; functionality and comfort for every trip. Our waterproof backpack, made of durable polyester, is the perfect combination of comfort and reliable protection in all conditions. Designed with travelers in mind, it meets the size requirements of popular airlines like LOT, Lufthansa, and many others, so you can take it on board as free carry-on luggage. The well-thought-out three-compartment design includes a padded laptop sleeve for up to 17" (36 x 27 cm) laptops, ensuring safe storage of your gear. It's an excellent choice for those who value functionality and comfort while traveling. Who is it for? The backpack is perfect for those who value functionality, durability and comfort during outdoor adventures. It's perfect for hikers, travelers and as a versatile everyday backpack. Our tip: The accessory goes well with outdoor clothing such as raincoats, trekking trousers and hiking shoes. If you prefer a different accessory, consider our travel bag, which also meets the Free on Board requirements. Key features: The compact size (47 x 32 x 14 cm) makes the backpack perfectly meet the carry-on luggage requirements of many popular airlines, such as LOT or Lufthansa. The dimensions given refer to the standard version, without expansion. Padded laptop compartment: Secured with a Velcro strap, it protects your equipment (max. dimensions 27 ¾ 36 cm, 17") and stabilizes it even when moving. Capacity: The backpack is expandable (by 4 cm), allowing you to increase its capacity, perfectly adapting it to your changing needs. Material: Water-repellent polyester protects against rain and moisture, suitable for difficult terrain. Main compartment: The compartment opens like a suitcase, offering three elasticated pockets for storing smaller items. Security straps keep the interior organized and provide easy access to the contents. Composition: 100% polyester, lining: 100% polyester. Comfortable and functional features: Adjustable shoulder straps: Padded with structured mesh, they ensure comfort and ventilation, even on long trips. Vertical back strap: Easily attaches the backpack to a suitcase handle. Compression straps: Snap-closure closures allow you to adjust the backpack's volume. Chest strap: Keeps the backpack stable during intense walking. Additional pockets: Three front zippered pockets are perfect for small items. The side pocket can be expanded with a zipper to accommodate a larger water bottle or thermos, while the small pocket is perfect for essentials (keys, cards). Ready for new adventures? See how this backpack will become your reliable travel companion! The airlines mentioned in the description reflect the backpack's dimensions in its basic form, without expansion.