• plastic
• Outdoor observing:they are for long time of using and would hardly fail you when in the wild,hiking observing
• Observing kit for :this set is light in weight and easy to carry, and would not be a burden for you trip,outdoor observing
• Wilderness observation:you could use thses tools to observe the you find in the wilderness,outdoor observing
• Observe tools:great educational tool kit,outdoor observing
• Hiking observing:this set of tools is great for your if you are about to go out for an expedition,outdoor observing