The Bonetto Cinturini Ref. 281 Black Vintage Rubber Strap are Made In Italy using natural rubber. What this means is that they are strong, supple and water resistant.
And because they are using natural rubber means they are not attracted to dust and particles (read: not lint magnet) as compared to lower quality silicon straps found outside.
Made in Italy
Material: Genuine Italian Rubber
Available in Black, Midnight Blue, Orange.
Sizes: 20mm, 22mm
Buckle width: 20mm
Length: 80/135mm excluding buckle
Length to smallest hole: 50mm