Our US-made dog collars are built to be used for years to come. STRONGER DURABLE WEBBING: We use a top quality polyester webbing made in the USA just for us rather than the nylon used by most of our competitors because polyester repels water, is rot and mildew resistant, doesn't stretch like nylon when wet, and is 5x more abrasion-resistant than nylon. HIGHEST QUALITY BUCKLE: We use Duraflex acetal buckles rather than more common nylon or metal buckles. Acetal buckles have higher tensile strength than nylon, resist moisture better, and perform better under freezing or arid conditions. We chose acetal over metal because metal corrodes in salt water, creating problems when dogs go swimming (as they often do in our part of the world!