I have been a professional traveler for my job for 15 years and never wanted "extra" things in my bag, but these are the best and I am not sure how I have lived without them! I don't have to unpack my whole bag anymore... small sock or undie bags stay in the suitcase, the toiletries go to the bathroom in the hotel and the big bag of clothes get hung up, then that bag becomes the laundry bag. These are great! They weigh nothing and take up no room, if you don't have them, you need them.