Some great alternatives to the Apple Watch Nike+ band
Noya Apple Watch Band Soft Silicone Replacement Nike Sport Strap (42mm, White/Black) - YouTube
Amazon.com: Carterjett Compatible with Apple Watch Band 41mm 40mm 38mm Nylon iWatch Band Replacement Strap Military Style Compatible for Apple Watch Sport Nike Series 8 7, Series 8 & SE, Series 7
2 Nike Replacement Sport Bands for Apple Watch S/M 44mm - Black/gray Black/white | eBay