Reduce accidental touches and scratches to the front lens
Sweat resistant and dust proof
Still install uv mirror and cover, suit for canon ef75 - 300 usm, ef - s 55 - 250mm lenses, for canon 55-250 ef75-300iii, camera et 60 ii lens hood et-60 ii for canon ef75-300mm f/4-5.6 iii ef-s 55-250mm f/4-5.6 is et - 60 lens hood for canon ef75 - 300 usm / ef - s 55 - 250mm
Put it in reversed position for convenient to carry