This is a handmade tote bag that can also be used as a backpack. The exterior is made of vinyl material, so it's safe to use even in the rain. Because it's vinyl, it might require some force when squeezing it. It's the perfect size for things like gym clothes. Please refer to the photos with the measuring tape for detailed dimensions. It will be folded and shipped via post. Instant purchase without comments is welcome. Feel free to buy it anytime, day or night. Thank you.