CACTUS is a collection sure to be noticed! Unique in design. the collection features injected shock-absorbent corner protectors. water-resistant zippers and DELSEY's patented SECURITECH® lock system. providing an additional layer of security for your belongings. The bags are also equipped with DELSEY dual-advanced wheel system. with back wheels 20% larger to resist wear and tear. and accommodate both 2 and 4 wheel use.