Dynamic internal details envelop with spiraling stimulation! The TENGA FLEX spins, sucks and embraces with its unique spiral-ribbed casing.There are four varieties to enjoy, each with different internal details and material strength! Gentle spiralling ribs embrace with delightful suction. How to Use the FLEX Remove the Stand Cap and lubricate the insertion point and inside of the Elastomer Sleeve. Cover the air hole to create an internal vacuum! Using the item with the air hole covered also provides a brand new spiralling sensation! After use, remove the Elastomer Sleeve and wash with water. Pat dry after washing. (The Elastomer Sleeve can be inverted for washing.) Invert the Stand Cap to use as a drying stand.Place Elastomer Sleeve on the Stand Cap to air dry. Once dry, revert the Stand Cap to its original state and insert it into the Casing to store. Store in a cool, dry, dark place away from direct sunlight.