The Breo watches are moulded in one piece with a silicone rubber band and housing that you just stretch over your hand to put on. There's no clasp or anything to snag so they fit well over your wetsuit and gloves but you have to buy the right size for your wrist since there's no adjustment. Small digital display that will show time and / or date, replaceable battery, waterproof (mine's been in the sea and through the washing machine), cheap at £10 so you're not going to gutted if its lost or broken and lots of colour options. Good stuff.

http://www.breo.com/

