The biggest advantage of Apple watch is strap on apple watch is easily changeable, and the choice is huge. Apple makes its own bands for Series 1,2,3 Apple Watch but official straps are very expensive and you are not limited to just official Apple offering.
Watch strap is like a phone cover which gives entirely new look to the watch also its very easy to change the strap. You can build your own collection of bands which can go with different outfits and activities. These are some popular straps available for your apple watch:
Cuff Bands:
Cuff Bands are for those whose looking for little sturdier and stronger grip on the wrist. These bands are on the bulkier side but provide extra grip to the user.
Single Tour Bands:
Single tour bands are the simple leather bands with no fancy attachments. These are light in weight therefore easy to wear on wrist on daily basis.
Double Tour Bands:
Double tour bands are basically designed for the thin wrist but now everyone wears on their wrist like the leather bracelet. Double tour bands provide extra grip and sturdiness but at the same time adds up style by acting as leather bracelet.
If you are looking forward to buy apple watch bands than you can buy from olpr.com they have great collection of leather watch bands with great discount and customer support. Olpr  is amongst the leading brand in the leather industry. Despite your budget, there is an abundant range of watch bands available for your apple watch. You can also customise your watch band as per your need, all sort of sizes and color are available. You can design your watch band from the scratch to the finish by selecting the leather type, color, stitching color, material, type of band.