velcro

Just the one because Velcro is a Brand name , hook and loop fasteners are the actual product that Velcro did not patent

Velcro may lose its sticking ability when wet because water can weaken the adhesive backing on the hook and loop fasteners. It is recommended to avoid getting Velcro wet to maintain its effectiveness.

Because it has already been invented by George de Mestral, but there not aloud to make velcro just things like velcro which are like the 'loop and hook':)

Velcro, buttons, ribbon, toggles, plastic buckles, magnetic fasteners.