Stay overnight, outdoors, in the winter.
Winter camping takes a special breed of those that enjoy the outdoors. To qualify for this patch you need to camp outside while backpacking or regular old camping. Cabin camping does NOT count! You must also do it sometime between the official start and end for one winter season. In looking at a few years worth of winters, this typically will be from December 21st through March 20th. Yes, you could technically qualify by waiting for a warmer winter night but what's the fun in that? The colder, the better the bragging rights. Just make sure you have the appropriate amount of clothing and equipment to keep you warm.
Measures 3" high by 3" wide with hook and loop backing.