These Yoga Straps are made of 90% polyester and 10% cotton, and easy to use metal D-ring buckle on our Yoga Strap. 183cm length should be enough length for most yogis. Perfect giveaways for yoga studios or home practice, yoga straps make hard to grasp limbs a little easier to reach and hold onto. Use this strap to increase your range of motion and reach more challenging poses. Contact us to learn more.