1. A flat fanny pack that's slim and discreet enough to fit under your clothes, so you can keep your cards, cash, and other important essentials hidden away from potential pickpockets. It also features RFID blocking to keep your information from being scanned! Promising review : "Discreet yet spacious.

I purchased this for a recent trip. I was able to fit my phone, passport, credit cards, and cash in it easily, and it wasn’t bulky or obvious under my clothing . It was comfortable to wear for extended periods of time.

" — KailensMom Get it from Amazon for $15.95 (available in 21 styles and two sizes). 2.

A travel pillow you can stuff with clothes to free up space in your carry-on! It's designed to fit up to fit up to three days' worth of outfits, and reviewers say it's surprisingly comfortable. This might be the ultimate packing hack you didn't know you needed. Tube is a small business that specializes in uniquely designed storage travel pillows.

Promising review: "I bought this looking to both save space and gain comfort for those long airplane rides. I was pleasantly surprised that they worked so well and fit so much into them while not sacrificing baggage space. I could fit at least a full day's worth of clothes in it.

Also works well if you have one of those backpacks with the attachment clip and loop system as you can use this as a strap to avoid purchasing another carry-on bag from airlines." — Victor Tolentino Get it from Amazon for $49.95 .

3. Or a Trtl travel pil.