Three cases cover three different kinds of trip. The smallest measures 13.5 in by 8 in by 22.5 in, holds 37 L, and meets airline carry-on standard for journeys of one to four days. The middle case runs 16 in by 10 in by 27 in at 72 L and checks in for four to seven days. The largest, 18 in by 11 in by 31.5 in and 107 L, is the checked bag for seven to nine days away. Individually they weigh 5.5 lb, 6.5 lb, and 9 lb, and the three together come to 21.5 lb in total. Between trips the nesting design earns its keep: each case stacks inside the next, so the set occupies roughly the footprint of the largest piece instead of three separate corners of a closet. All three ride on 360-degree double spinner wheels that roll silently and stay smooth and flexible under a loaded case, and a sturdy adjustable telescoping handle plus reinforced grab handles make lifting into an overhead bin or a trunk more comfortable. A built-in 3-digit combination lock secures each case. Inside, multiple compartments keep clothing, shoes, and small items separated and accessible rather than pooled at the bottom. The hardshell is molded from ABS with TPE and PP, a combination that resists scratches and absorbs impact so the surface holds its look through repeated handling, and smooth zippers open and close without catching.