The Centrostyle Adjustable Retainer Bands in black color, size Large, are sporty silicone cords with elastic sockets that fit on the back of the arm. They feature a clip for length adjustment, allowing a tight or loose fit on the head. They are suitable for thin and medium thickness arms.

Product features:

• Specifically made from hypoallergenic materials.
• Specially designed for use in sports, at the sea, and in the mountains.
• Extremely soft and flexible.
• Lightweight (12 grams).
• Resistant to frame deformation.