Adjustable Strap Shoes are shoes that are secured to the foot using some type of fastening device that can be customized to the wearer's foot. Types of adjustable straps include hook and loop fasteners or buckles.
About Canvas:
A heavy, coarse, closely woven fabric of cotton, hemp, or flax, used in casual shoes and handbags. Because of it's durability, canvas is generally not very flexible and does not wear out quickly.