Model: Sensor Holder
Compatible: Nike + iPod Sport Kit/Sensor
Simplism Nike + iPod Sensor Holder
Though we've seen many similar alternatives before, Japanese brand Simplism has its own Nike + iPod Sensor Holder ($10), a silicone rubber pouch in your choice of four colors. Each one holds the Nike + iPod Sensor inside using a rubber flap and a plastic pin, attaching to shoelaces when the flap is opened to expose a thin gap in its back. It's a nice little design.