From the manufacturer

Features

• Rapid length adjustment via the DoubleBack buckle
• Equipped with a STRING, which holds the carabiner in position and protects the carabiner attachment loop from wear
• 3mm hole in buckle for attaching a cord to facilitate adjustment
• Loop on the free end of the webbing for attaching a piton during placement
• Foot retention system helps keeps your foot in the step while ascending 

Specifications

• Material(s): Nylon webbing, DoubleBack buckle of aluminum and heat-treated steel
• Weight: 142g