The avarca sandal is a traditional work shoe, as worn by Menorcan farmers in the 19th century. The combination of a robust rubber sole and cowhide leather straps made them ideal for the warm climate and dry, stony soil of the island. Today, the sandal has become synonymous with the Mediterranean lifestyle. In keeping with this tradition, the Castell manufactory has been producing these classic models with a narrow heel strap since 1985. In addition to the black treaded sole made from recycled car tires and the small toe opening, the sandal is characterized above all by the extremely durable, prominent hand stitching. Up to size 41, the Avarcas are made on a women's last, from size 42 onwards on a slightly wider men's last.

Since it was founded over 30 years ago, the Spanish manufacturer Castell has been committed to traditional footwear craftsmanship - and produces its sandals by hand as far as possible. Castell also continues to produce at its namesake company headquarters to this day. With the "Made in Spain" label, they carry the island's heritage out into the world. No other manufactory in Menorca adheres so consistently to traditional production, local craftsmanship and the "spirit" of the Balearic Islands.