The Briggs & Riley Baseline 20" Carry-On Expandable Upright with model number U420ZX-4 is a compact, high-capacity carry-on luggage designed for domestic and international travel.  It features a shorter and wider configuration (20" H x 16" W x 7" D, expanding to 10" D) that allows for packing full-size shirts and fits most overhead compartments. 

Key features include:

• Outsider® Handle System: Provides a flat packing surface inside the bag for wrinkle-free storage and easier packing. 

• Expansion: Zip-around expansion system increases packing capacity by approximately 30% (or 2.5 inches) when needed. 

• Garment Care: Built-in tri-fold garment sleeve with a foam roll bar to prevent wrinkling for 1-2 suits. 

• Durability: Constructed with 2520D ballistic self-repairing fabric that resists wear, water, dirt, and abrasions. 

• Warranty: Backed by Briggs & Riley’s Simple as That lifetime warranty, which covers airline damage. 

• Accessories: Includes a SmartLink® system to attach multiple bags and a J-hook attachment for hanging. 

The U420ZX-4 is part of the Baseline collection, which is generally considered more durable and feature-rich than the standard Transline line, often compared favorably to premium brands like TravelPro for long-term use. It is typically priced between $329 and $735 depending on condition and retailer.