The Adafruit Flora was developed specifically for wearables projects, and has 14 sewing tap pads for connecting conductive thread to your components. It features an onboard battery connector and a 2A power FET, making it easy to add portable power (and plenty of it). With so much power, the Flora is perfect for controlling large numbers of LEDs, and it can even drive up to 50 NeoPixel addressable LEDs straight from the onboard supply.