PERFECT for TRAVEL - 26L(XLarge) for winter coats, sweaters, pants. 15L(Large) for shoes, jeans, t-shirts and shorts. 9L(Medium) forunderwear, bras, socks, and smaller/thinner garments of clothing. LITE Gear Pouch for cards, cash, tech data cable, cosmetics, toiletry etc. HUGE SPACE SAVER - Fill all clothing up and compress down, it will save a lot of space of suitcases, Allows you to carry a ton of clothes for weeks long trip. Zippers Pipe makes the extensible/compression zipper lighter in use 2 SIDED COMPARTMENTS - Every bags have double sides independent storage design, Can separate clean/wet. When clothes get dirty, just stuff 'em in the backside and you're good to go. DURABLE & QUALITY MADE - Built from 210D waterproof ripstop nylon, Sturdy and wear-resistant, its reinforced seams are double-stitched, You can use them for years. 2:1 RATIO SIZE - 9L=1/2 size of 15L=1/2 26L. G4 is perfect for 26 inch luggage, so can easily figure out a combination of cubes that will work while still fitting nicely into the packs.With the frames being shaped flat, making them an perfect fit for squared-off luggage. BeeNesting Waterproof Compression Packing Cubes 5/6/8 sets, Large Travel Packing organizers for Carry on Luggage, 2 Sides Expandable Storage Bags for Backpacking, Suitcases