Check the listing for details. Sun Company Original Zip-o-gage - Zipperpull Thermometer. Condition: New. Listed at 6.99 USD. Zipperpull Thermometer for Jacket, Parka, or Pack | Outdoor Thermometer with Windchill Chart on Back AN AMERICAN CLASSIC - Since 1971, Zip-o-gage has been the most trusted personal thermometer for the outdoors. It's lightweight and small enough to take practically anywhere! Truly, a great addition to your keychain and can also serve as an awesome gift!CUSHION MOUNTED THERMOMETER - Our accurate thermometer reads down to a chilly -20° Fahrenheit or -30° Celsius.WIND CHILL CHART - Included on the back and is extremely helpful while in cold weather.HANDY KEYRING - Attach to your coat, pack, zipper, or anything else you can think of. The Zip-o-gage is the perfect addition to your camping, hiking, survival, and travel gear.AN OUTDOOR ESSENTIAL - Zip-o-gage is a must-have accessory for camping, hiking, backpacking, skiing, or travel.