The D’Addario Eco-Comfort Vihuela Strap line is an eco-friendly soundhole hook style strap made specifically to support all Vihuelas with a standard soundhole. The strap is made from an Eco-Friendly fabric, made from recycled water bottles, and is super comfortable while also being super durable. The hook is made from a soft rubber that will not harm or scratch your vihuela but is strong enough to support the weight of the instrument.