Therapist&rsquo;s Choice Stretch Strap Delivers the benefits of PNF stretching without a partner Stretching Aid and Patient Guide Triceps, Arms, Shoulders, Outer Thigh and Hips, Hamstrings, Quad, Calf, Low Back. Triceps, Arms, Shoulders, Outer Thigh and Hips, Hamstrings, Quad, Calf, Low Back. Firm non-stretch webbing on one side and elastic stretchable loops on the other. Comes with basic instructional manual