The stretchable elastomer concealed within each of these discreet eggs expands drastically for a snug fit regardless of your size. The one-time-use sleeve comes with lubricant inside the egg container. Made of TPE, a body-safe elastomer. They make for great travel companions. The texture shown on the package mirrors what the sleeve texture is like inside. 

are very soft with a lot of stretch. Hard Boiled Tenga Eggs are a firmer material.