When running in cold weather, which one of the following materials isnot recommended for layering next to the skin?
a. cotton b. wool c. nylon d. polyester

When running cotton isn't recommended for layering next to the skin because holds moisture and doesn't allow the body to properly regulate temperature. Wearing cotton while running will result in freezing in winter and overheating in summer. Once cotton gets wet, it stays wet. Much better choices are polyester and nylon which are breathable fabrics and will keep you dry and comfortable while running.

Your dog can sniff at or even eat a bit of catnip. the herb is edible and not harmful. just don't expect them to roll around like a cat would! your dog may scrutinize catnip by licking and smelling at it, or be totally indifferent to this stimulant.