Velcro is used instead of zips ect. It has hooks so that they can cling on.
Because it is...duh! Look it up. (:Have a nice day!
Just the one because Velcro is a Brand name , hook and loop fasteners are the actual product that Velcro did not patent
It is made of the association of two French words: vel for "velour", velvet in English; cro from crochet", hook in English
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