The Coghlan’s Zipper Pull Thermometer is a compact, high-utility micro-tool designed to provide critical environmental data at a glance. Tailored for hikers, campers, and outdoor enthusiasts, this lightweight accessory ensures you are always aware of the ambient conditions. Its low-profile design allows it to be permanently attached to a jacket, sleeping bag, or backpack zipper, making it an indispensable addition to any outdoor layering system. Features Dual-Scale Thermometer: Provides accurate temperature readings in both Fahrenheit (°F) and Celsius (°C), offering global utility regardless of your preferred measurement system. Integrated Wind-Chill Chart: The back of the tool features a printed wind-chill reference chart, helping you calculate the perceived temperature and assess the risk of exposure in windy conditions. Zipper Pull Attachment: Designed with a durable nylon cord loop for easy attachment to any zipper slider, providing a tactile grip and immediate access to information. Rugged Housing: Encased in a durable, weather-resistant housing built to withstand the bumps and scrapes of mountain trekking or daily commuting. Ultra-Compact Profile: Small enough to remain unobtrusive on a jacket or pack while providing high-value data without the need for batteries. Specifications Features: Thermometer / Wind-Chill Chart Scales: Dual °F and °C Attachment: Nylon Cord Loop Power: Mechanical (No batteries required)