These are spiked strap style collars. They are made with 3/4" synthetic leather. Our synthetic leather is a very durable PVC coated nylon which is engineered to be highly resistant to cuts and abrasion but still flexible at low temperatures. Unlike leather our synthetic leather will not rot, mold or fade. The spikes on this collar are 1" tall and spaced 1/2" apart. These collars are made with a welded dee ring and a die cast buckle. Available in black only. 100% Made in USA