Italia 4" leather strap - italiastraps.com, $79
Gorgeous handmade leather strap, 4" wide, also available as 2.5". The strap is constructed with a smooth leather upper, and suede backing. The generous width ensures that the weight of the bass is well distributed, and the suede backing combats neck dive. Italia offers several colour choices, so you can get the strap with a different colour upper and backing. A problem, which I discovered with my black/tan specimen, is that the suede backing tends to shed on your clothes. After using the strap for the first time, I had tan suede residue all over my black shirt. A lint roller took care of it, but it was annoying nevertheless. Besides, how many bass players bring a lint roller to gigs?
The length adjustment uses the standard strap-looped-through-slots arrangement, which I've never really liked, but which has the advantage of having no hardware to scratch your bass. The 4" version also has a tendency to dig into the side of your neck after a while, especially if you wear T-shirts or anything else without a collar.
My main problem with this strap (as with every other strap I have reviewed so far) is how it works with ordinary strap buttons. In this case the strap is so thick that it's a real struggle to get on and off. Once it's on, though, it won't come off in a hurry. It works better with some strap button designs than with others, Fenders are OK, for instance, Musicman not so much. Yet again, strap locks would help, but it should really not be necessary.
EDIT: Forgot to mention - huge and really tough to fold, so not really gigbag-friendly, unless you leave it on the bass, which I don't like to do. That said, since there is no metal anywhere on the strap, it poses no risk to the bass if you choose to do so.
My verdict:
Comfort:7/10
Design: 7/10
Materials: 8/10
Value for money: 7/10