Is Puning Aiyinglu underwear made of pure cotton?

No, according to the inquiry of Puning Aiyinglu official website, the material of Puning Aiyinglu underwear is ice silk. It is a kind of viscose fiber, belonging to regenerated fiber, with good hygroscopicity, good permeability, poor elasticity and easy deformation. This kind of underwear usually has good air permeability and hygroscopicity and is suitable for wearing in summer. So Puning Aiyinglu underwear is not pure cotton.