A glass composition of the present invention is oxide glass and has a composition that satisfies: 60 wt %<B2O3<78 wt %, 15 wt %<ZnO\u226624 wt %, 6 wt %\u2266R2O\u226616 wt %, 1 wt %\u2266MO<17 wt %, and 0 wt %\u2266SiO2\u226610 wt %, where R denotes at least one selected from Li, Na, and K, and M indicates at least one selected from Mg, Ca, Sr, and Ba. A plurality of air chambers is carried above the middle fabric cover layer, and a resilient pad overlies the air chambers. In response to activating the icons, the mobile device retrieves and transmits data associated with sales and marketing data obtained by canvassing a neighborhood and displays this data to the mobile device user. The transmitter may perturb entries of the data vector one-by-one in an iterative fashion until a minimum in an energy value of the transmit data vector is obtained.