This is a collaboration power grip between VOLIX and sff. It's a wrist wrap used for pull-ups and deadlifts. I bought it, but the size didn't fit, so I never used it. Thank you for your consideration. Highlights: 【Power Grip Made with the Utmost Attention to Detail by Trainees】 The development staff are trainees themselves, and they used and tested it in actual training, going through trial and error to complete it. With a holding power that won't let go even when your grip gives out and a stable design that protects your wrists, you can train beyond your limits! It solves the problem of your forearms tiring out before your back muscles during "back training" such as deadlifts, pull-ups (chin-ups), and lat pulldowns. 【Wide Shape for Grip Hold Even with Little Grip Strength】 The wide and long rubber wraps around the shaft, making it difficult to slip. Wrapping it around the shaft is easy with one hand! For grip assistance. It eliminates the need for troublesome wrapping like wrist straps, making it ideal for intermediate and advanced users who want to shorten their intervals, as well as beginners and female trainees who lack grip strength, for stable form. 【Three-Layer Design That Doesn't Hurt Your Palms or Wrists】 Designed so that the metal fittings don't dig in, so you can concentrate on training without wrist pain! The highly cushioned material prevents the wrist from digging in and friction from high-weight loads. Recommended for those whose palms tend to peel or who want to prevent blisters. 【Passed Tensile Strength Test in Japan】 VOLIX non-slip rubber not only doesn't slip, but also has a total tensile strength of "762kg" for both hands, so you can use it safely and securely without worrying about tearing. It has the durability to withstand a hard workout environment without the fear of damage even in ultra-heavyweight exercises such as shrugs and heavy rows.