I've been using my "Twins" bag gloves for 8 years and they look and feel every bit as good today as they did when I started using them. I believe they're 8oz but like others have said, wrapping your hands properly is very important.
I suggest that it you've hit a bag before and plan to stick to it as part of your routine, don't cheap out on your gloves. Cheap ones will not last and you'll end up spending more in the long run.
MODS: Meisterschaft GT Racing Exhaust / BMC Air Filter / UUC SSK & DSSR (Modded)/ RPI Scoops / Passport SRX Hardwired / Custom Wrap 3M Clearbra / 20% Tint / 50% Windshield Tint / Key Hole Delete / Matted Out Accessories / VRS Type II Diffuser / Smoked Reflectors / Euphoria 6K LED Interior Lights / Rear Fog Light Mod / 6000K HID's / 6500K LUX H8 Angel Eyes / RDash License Plate LED Kit / LED Xenon Reverse Lights
"M3 drivers have no friends"