The Discovery Eyeshade is made of Medical grade Silca Gel, not rubber. Silica gel is tear resistant, temperature resistant and  has no odor.

  •  Designed for fitting 38mm-48mm diameter of the eyepiece with no attachments.
  • Relieve Eye Strain by Blocking Glare or Enhancing Low Light and improve target focus by eliminating distractions from peripheral vision.
  • Eyeshade design enables quick eye positioning for correct eye relief and optical  center alignment to enhance target acquisition and sighting accuracy.