Greenroom136 Rainmaker vs. Exped Whiteout 30

The Greenroom136 Rainmaker and the Exped Whiteout 30 are two examples of high-quality carry-on backpacks, each with their unique advantages. The Rainmaker, with dimensions of 40"x28"x21", is a notable for its size and durability. It tips the scales at 1.7 pounds and has a capacity of 22 liters, making it ideal for day-to-day use and short trips. Greenroom also prides itself on using 1000D Cordura, a sturdy, water-resistant material. Plus, its 100% airline compatibility makes it a reliable pick for frequent flyers. The Rainmaker also houses a padded laptop compartment that can protect a 15-inch device, sufficient for most users.

On the other hand, the Whiteout 30 is a lightweight champ, weighing just over half a pound at 0.685 pounds. Despite this, it boasts 30 liters of storage, 8 more than the Rainmaker. Made of Dyneema composite fabric that combines durability and feather-like weight, this backpack is an outdoor-lovers' dream. Moreover, its 20,000 mm water column specs attest to its top-notch waterproof capabilities. But its narrow compatibility with airlines (30%) and lack of laptop compartments might not appeal to city roamers and work-trippers.

• Size: Rainmaker (40"x28"x21") is larger than Whiteout (22"x27"x57")
• Weight: Rainmaker (1.7lbs) is heavier than Whiteout (0.685lbs)
• Material: Rainmaker uses Cordura fabric, Whiteout uses Dyneema® composite fabric
• Storage: Rainmaker offers 22L capacity, Whiteout provides 30L
• Laptop compartment: Rainmaker fits a 15" laptop, Whiteout lacks this feature
• Airline compatibility: Rainmaker is rated 100%, Whiteout at 30%

Both backpacks come highly recommended, but for somewhat different use-cases. Quote one reviewer of the Rainmaker: "Overall, it’s a solid pack that values function above all else. And all of the customizability options are incredible" and another one posited Greenroom136 as "one of the best value bags on the market". Meanwhile, the Whiteout also comes with high praises from users, with a reviewer describing it as "ultralight and nearly indestructible" and another extolled its simple design and durability, saying "it's comfortable, but not luxurious. It is for climbers wanting a light pack that can be hauled, beaten, and abused. Rain will not get in".

In summary, both the Greenroom136 Rainmaker and the Exped Whiteout 30 are remarkable pieces of carry-on innovation, but they appeal to somewhat different market segments. The Rainmaker offers more features that cater better to urban commuters and frequent flyers who prefer a versatile, sturdy pack. In comparison, the Whiteout 30 seems to be the better choice for adventurers and outdoor enthusiasts who require a waterproof, ultra-light, and durable backpack.