Feather-light and durable bottle sleeve. The Sigg protective sleeve is suitable for all Sigg drinking bottles with a capacity of 0.4 liters. It protects against cold hands when very cold drinks are filled into the bottle on hot summer days. Additionally, the bottle sleeve impresses with its pleasant feel and robust design, yet remains feather-light. The sleeve is, of course, free from phthalates and estrogen-active substances. It is not suitable for Sigg's Hot and Cold bottles.