Catit Adjustable Nylon Expandable Cat Collar. Catit Collars are made from snag-proof nylon weave that will not shrink or tighten when snagged or scratched by cats. The Catit Expandable Collar has built-in elastic inserts that can allow your cat to wiggle free from its collar should it become caught in bushes, fences, etc. Catit Expandable Collars are available in 3 fashionable colors. Key Features : Snag-proof nylon weave Expandable collar Will not shrink or tighten when snagged or scratched by cats Built-in elastic inserts allows your cat to wiggle free from its collar should it become caught Available colors : Red and Black Dimensions : 20-33 cm (8-13 in)