Eco Keeper Bee Jacket (Hooded Jacket)The Eco Keeper Bee Jacket is made of a lightweight material that is lighter than heavy-duty cotton but just as durable and protective from bee stings. Because of the lightweight material, it keeps you cool but keeps the durability at a beyond excellent level. The Eco-Keeper Bee Jacket features the use of a tightly woven fabric that pulls threads tightly together to keep the bees from stinging through the material. Because it is made of a 60% cotton 40% polyester blend, it is much lighter the heavy duty cotton that is not only heavier but a lot hotter when the days get warm.