Cannabis (Marijuana) Withdrawal. By Johnna Medina, M.A. ~ 1 min read. Cannabis withdrawal involves experiencing at least two psychological and one physiological symptom (at least three symptoms total) after stopping heavy and prolonged marijuana use (e.g., daily or almost daily use for the past several months).ome psychological symptoms a person may experience following cannabis abstinence include: 1  Irritability. 2  Anxiety. 3  Depressed mood. 4  Restlessness. 5  Changes in sleeping (e.g., insomnia, fatigue). 6  Changes in eating (e.g., reduced appetite/weight loss).
Bullet resistant, not bullet proof. What most people consider bullet proof are soft vest armor like that worn by police officers. This is typically made of Kevlar, DuPont trademarked fiber. This aramid fiber is incredibly strong with very hig...
Helmets are largely made of plastics, but the good news is that most of the plastics used are probably safe. Helmet shells may be made of the type of plastic now suspected of leaching out the chemical BPA. High-end helmet shells are often made from polycarbonate (GE's Lexan for example). It has been associated with high quality helmets for more than 20 years, particularly those that are molded in the shell.