The prAna Raja Yoga Strap helps you to improve your form and hold stretches longer by making hand-to-foot and hand-to-hand connections using a yoga strap. Great for beginners and physical therapy patients focused on improving flexibility. The Raja Yoga Strap is designed for those newer to yoga to aid with tight shoulders and hamstrings. This six-foot strap has a square profile traditional D-ring buckle and is made from cotton webbing. 1.5 (3.8 cm) wide. 100% Cotton. Material: Cotton.