SAVE ON YOUR CARRY-ON CHARGES - This travel bag measures 17.7 x 12.6 x 6.3 inches, making it the perfect fit for the 18 x 14 x 8-inch personal item size requirements of Spirit Airlines and Frontier Airlines. It can be placed under the seat to help you avoid oversize charges. 25L CAPACITY - Ample space to accommodate all your in-flight comfort and entertainment essentials. If you're on an overnight trip, this could easily be the only bag. EASY CARRYING - The weekender travel bag features a trolley sleeve that effortlessly slides over the handle of a standard suitcase. Additionally, it includes exterior pockets for convenient storage of your daily essentials. Model B comes with a detachable shoulder strap (Model A not included). DURABLE NYLON - Crafted from water-resistant and tear-resistant fabric, this material ensures the protection of your gear from rain and can effortlessly handle heavy loads. MULTIFUNCTIONAL - Whether you need a weekend bag, overnight bag, gym bag, sports bag, workout bag, travel tote bag, or even a hospital bag, this versatile companion is perfect for all your needs. Unfold dimension is 17.7x12.6x6.3 inches, meet spirit airline personal item carry on limit 18x14x8, can be placed under seat, save your overweight charges.