Caden Neoprene Premium lens Case - This is better than their standard cheap cases you find on amazon. 
-Full top sealing drawstring top
-metal carabiner clip
-removeable neoprene disc inside case that provides more protection at the top (or yuo can leave it and double up the neoprene layers at the bottom--I actually used this along the side of the lens so it didn't shake as much. 
-belt loop below the carabiner that can accomodate a 3.5" belt

Never been in field, was storing a lens in my dry cabinet the while time I owned it

Some marketing pics included at the end of the picture set