With this revolutionary training tool, you'll do away with the constant reminder to "keep your elbows in". It will improve your technique, form and ultimately your punching power as you deliver every punch accurately. It's easy to put on and take off thanks to the repositionable arm loops. Made of a semi-elastic/polyester material that has a slight pliability making it more comfortable, useful for fighters of different sizes and also washable. Available in three sizes. Colors may vary. Size chart: Size length of tape width of hand holes width of the tape Y 40.5 cm 10.2 cm 5 cm M 51 cm 13 cm 7.6 cm L 56 cm 15.3 cm 10.2 cm