This is a STANDARD DUTY 7mm cord. All-round leash rated for MEDIUM to LARGE WAVES. Stronger DNA 2.0 - Spiral flex and scallop design for the strongest connection. Patented Design. Faster QUICK CONNECT - No-knot string solution. Precise, error-free attachment to surfboard everytime. Patent pending. Secure NON-SLIP CUFF - Comfy, light, spongy. Patented material finish grips to your skin and wetsuit. Safer QUICK RELEASE - Easy to grab loop for cuff removal. Geared for emergency situations. Introducing RELIANCE 2.0 - our STRONGEST, most RELIABLE, and most COMFORTABLE leash we've ever built. Attach your leash to your board faster and more secure than ever before with QUICK CONNECT (without tying yourself in knots). Tested in the most intense conditions by the world's best - RELIANCE 2.0 is BUILT FOR PUNISHMENT.