Really like the Leupold design and my son has those on his 4.5-14x40mm. They are quite, well built, and just plain work. I use the soft rubber bikini type on a couple of my own scopes as I haven't purchased the Leupold covers yet and they work very well also. I also just spent a whole season using the full length neoprene type of cover on my 25-06 while hunting for Mountain Goat this fall. The cover worked great and provided a little measure of additional protection for the scope.