I like the Moody 4" leather strap for a fancy option and they are of the utmost quality but honestly, after having expensive straps from many different makers, I actually prefer the 3" wide Levy cotton adjustable straps. They're very lightweight and flexible, they have some give, they distribute weight very evenly, they're durable, and they're very affordable compared to leather. I have eight of these with matching Straploks for all my basses.
The Signature Cotton series showcases guitar straps made from soft and breathable cotton fabric, known for its comfort and durability. These straps are meticulously designed with Levy's signature leather badge, a mark of quality and craftsmanship that sets them apart.
levysleathers.com