All items are woven by hand with love from Commercial Type III 550 Paracord. These handmade collars not only look cool but are designed to last for years.  For those not familiar with 550 Paracord, it is very durable and strong. The 550 means it is tested to 550 lbs of pull strength. The biothane adapter is equally strong. My leashes and collars will hold up to very strong and feisty dogs - I've tested all my designs while walking dogs at a local German Shepherd and Belgian Malinois rescue, my last German Shepherd, and my pet sitting clients.