I ordered this after using clear pvc/mesh backpacks that I have gone through several of the same brand. I thought the mesh made into the pvc would make it sturdier. Not the case. I ordered another tpu backpack, got it, and it wasn't as large as I needed. I work in a correctional facility and all bags must be see-through. I ordered this one as soon as I got the previous tpu backpack, and WOW what a difference! This one is amazing! Big enough for me to put my drinks and lunches in with room to spare. Tough and not stiff in the cold and seems super heavy duty and well made. Thank goodness I finally found a good work bag!