Hold a burr seed pod in your hand and feel its texture with your fingers. Then use a magnifier to look closely at the seed pod. Use a magnifier to look at both sides of the hook-and-loop tape. Press ...

A Velcro loop fastener is made of brushed polyamide and contains tiny hairs. Hook and loop fastener tapes - Hook and loop fastener tape is made of adhesives that attach quickly to nonporous surfaces ...

But as even he admits, Velcro is a trademark, so we think it is more appropriate to talk about hook and loop fasteners. In fact, you can see the good-natured official video about the trademark ...