Ultimate Direction Groove Mono Belt Incredibly comfortable! The Groove with the Body Bottle Plus conforms to the shape of your body Single Rear PowerStretch Woven mesh pouch securely holds a 500ml Body Bottle Plus. ChannelWickTM mesh back panel creates channels for airflow and moisture management Trim Lo-Fi minimal front strap with key pocket. MonoRipTM mesh dual compression waist belt provies secure and breathable fit Individual compression bungee bands add extra attachment points Body Bottle Plus Recommended, SOLD SEPARATELY. Weight: 3.8oz. Fit Range: X-SMALL/SMALL - 26 - 33 in. MEDIUM/LARGE - 31 - 41 in