It's very rare that I don't travel without my 28" spinner luggage, but since I've discovered CabinZero, I'm getting used to fitting my stuff into a 44L backpack. It is perfect for a 3D2N trip.
Initially tho, I started with the 28L (L= liter) because I always like something compact but spacious that I can take as my carry-on luggage. It is lightweight and the material looks assuringly durable.
My first trip with my CabinZero was to Kuala Lumpur, Malacca and Penang. I was pretty amazed that Maurina managed to fit her stuff inside the 44L backpack for a 6D5N trip. So right after the trip I ordered a 44L Blue Camo.