T strap sandals are sandals characterized by a "T" formation by the straps on the top of the sandals. T strap sandals include a strap which crosses the top of the toes horizontally, while another strap cuts through the middle of the foot vertically.
About Wedge:
Wedge shoes, also referred to as wedge heels or wedges, are shoes with a triangular shape heel in the form of a wedge, with the heel and sole forming a solid block. Wedge heel shoes generally raise the heel of wearer between 1" to 3" and considered to be more stable that other types of high heel shoes. Wedge shoes come in a variety of styles, including sandals, pumps, and boots.