Here's what other sites are saying:
Wrist injuries are all too common in snowboarding, especially when you're learning the ropes. Keep yourself out of the ER and on the hill with the Dakine Nova Wristguard Mitten. The generous 280 grams of insulation makes these mittens toasty warm, and your hands will stay dry thanks to the waterproof polyurethane insert. There's a hard-wearing leather palm, which works just as well for strapping into your board as it does for hanging onto the snack you're munching on in the lift line. But you're probably here for the removable, integrated wrist guards. They support both the palm and the top of your hand, and the external straps hold the guard in place to keep you protected. They're warm, they're dry, and they're way more comfortable than a broken wrist.
The Dakine Wristguard Mitt is perfect for boarding, with the added support and security from the wrist-guard you will be well on your way!
With internal supports, the DAKINE Nova Wrist Guard mitts help protect and warm your hands and wrists as you boldly pull off tricks, jumps and gnarly drops. Lightweight, removable supports help prevent wrist torque without putting potentially harmful pressure on the forearms. Waterproof and windproof inserts and a Durable Water Repellent finish help keep your hands dry; cozy fleece linings and synthetic insulation help keep hands warm. Wrist cinches and gauntlet cuffs with one-hand-adjustable drawcords hold in warmth and seal out the elements. Precurved shape; grippy Rubbertec palms.
DaKine Nova Wristguard Glove
DaKine Nova Mitt
DaKine Nova Glove
DaKine Nova Short Glove
Outdoor Research Alti Mitts
$149 - $199
Black Diamond Mercury Mitt
$77 - $109
Black Diamond Guide Finger Glove
Black Diamond Punisher Gloves
$70 - $189