Victorinox Spectra 2.0 Large Expandable Spinner, Black Break-resistant 100% pure Bayer polycarbonate with scratch-resistant matte finish Expands an additional 11 cm (4.3) for up to 47% more capacity Exterior compression straps allow you to adjust the case to multiple sizes and customize your packing space Multi-stage telescoping handle Dual-caster wheels with soft tread