Water-resistant watch bands are designed to resist water penetration to a certain degree, typically measured in meters (m) or atmospheres (ATM). They are suitable for activities such as swimming, snorkeling, and other water sports.

• Water-resistant watch bands with a rating of 3ATM or 30m can withstand splashes of water or rain but should not be worn while swimming or diving.
• Water-resistant watch bands with a rating of 5ATM or 50m can withstand water pressure from swimming, snorkeling, and other water sports.
• Water-resistant watch bands with a rating of 10ATM or 100m can withstand water pressure from diving and other water sports.

It's important to note that water-resistant watch bands are not the same as waterproof watch bands, which are designed to be completely sealed and can be worn while swimming, diving or other water activities. Also, it's important to regularly check the water resistance of the band, as it may be affected by the passage of time, wear and tear, and environmental conditions.