Packing cubes have changed our lives, especially when traveling with kids. The perfect cubes should have strong materials, heavy duty zippers that are smooth, reinforced stitching, be relatively lightweight, have a mesh window, and come in a variety of sizes. Our eBags cubes meet all these criteria and still look brand new after stuffing them for many trips. We'll compare them.The Essentials cubes are of polyester, which is a strong material, though nylon is usually stronger. Even Ricardo's Dreamfel blend would be a step up. We felt the polyester was notably thinner than our eBags nylon, though that does make them a few oz lighter. I don't expect the polyester to rip after extensive use.They are provided with a full mesh window, which is better for visibility than our eBags cubes. However, I worry about this tearing if they're used for contents more rigid than clothes, especially since the mesh material is thinner than our eBags cubes.Our eBags cubes have larger, heavy duty YKK zippers with cord pulls that are smooth and easy to operate. They have never snagged or separated. The Essentials ones are smaller and lighter duty and I'm not sure of the supplier. They have flexible plastic pulls molded around a d-ring. I don't think these will last as I could start separating the two halves of the pulls without much force. They’re also nowhere near as smooth as our eBags cubes. They haven't snagged or separated in the couple trips we've used them on.A weak point of these is stitching. The zipper to polyester is a folded seam with a chain and overedge stitch. I don't expect to see any issues here. The mesh to zipper stitching is similar, but the mesh is only worked in, rather than folded in. Our eBags cubes have a basic lockstitch, but the seams are folded and reinforced with thick material. The corners that shape the Essentials cubes have chain stitching, but I worry this will be the point where these rip since the material is thin without reinforcement. The eBags cubes seams are well reinforced despite a lockstitch here as well.They come in three sizes, but the eBags cubes have several.Since they're similarly priced, the eBags cubes have more value.