Worth-Mats Envelope Style Trunk Cargo Net Mesh Storage Organizer for Mercedes R Class R300 R320 R350 R400 Custom Fit for Mercedes R Class R300 R320 R350 R400 Nice quality, high elastic rope to holding balls, sports equipment, books, bags and other loose items. Envelope Style Trunk Cargo Net, Easy to install. No instructions needed. Keeps items like groceries, toys, equipment, umbrellas, baby items from rolling around while driving Material: Spandex, Spandex has highly Elastic,able to be stretched 2-3 times