Sony Micro Vault Turbo 4 GB USB Flash Drive (USM4GJX) Bread measures 19-3/4 by 9.9-inch^Made of 100-percent cotton^Keeps bread fresh up to one week^Patented design with poly lining and draw string closing^Reusable . Blistering transfer speeds up to 28 MB/sec. read and 18 MB/sec. write Pre-loaded with Virtual Expander software for up to three times the storage capacity Retractable USB Connector for USB 2.0 and 1.1 Ports Stylish, white shell design available in 1 GB, 2 GB and 4 GB capacities Recommended USB flash drive for use with Windows Vista ReadyBoost