Withings Steel HR - 36mm Genuine Leather Strap (Black)

Leather smart watch straps are light and comfortable, making them a good choice to wear on a daily basis. They are also suited for more formal occasions.

Leather smartwatch straps might need a break-in period before the leather becomes supple and forms itself to your wrist. This could take a few days of regular wear. After the break-in period, leather straps are supply and comfortable to wear.

Leather smartwatch straps are very durable and can last a long time. The lifespan of course depends on how it's worn and cared for.