Sailcloth Canvas watch strap, waterproof watch band, fits PAM, U-Boat, Seiko and other heavy watches 19 mm, 20 mm, 21 mm, 22mm, 23mm, 24 mm - finwatchstraps
These Waterproof Leather Apple Watch Straps Are Rugged
Black Sailcloth Quick Release Watch Band Blue Stitch | B & R Bands