- PIKOLINOS. 902-8900 CUERO. ROTTERDAM 8900. CUERO. Rotterdam is an iconic range for the brand, with a very flexible and lightweight sole and a 5cm heel with leather details. The last has a great fit and personality, and it comes with a cushioned insole plus a tread designed to prevent slipping. This ankle boot, with a metallic outer zip for quick putting on and taking off, has a leather pull strip as the only decoration. The smooth upper of this model allows you to fully appreciate the unique Pikolinos finish.