The Union Suit is a historical undergarment that has been around since 1868. The Union Suit was first created in Utica, NY. Our Union Suit features a drawstring waist, plastic buttons on the top half, and flat snaps on the bottom half. Fabric * Fiber Content: 100% Merino Wool * OEKO-TEX® STANDARD 100 Certified * Woolmark® Certified * Responsible Wool Standard® (RWS) Certified * Knit: 235 g/m2 Midweight Interlock Knit * Microns: 18.5 Micron Fibers * UPF Rating: 50+ * Total Easy Care: Machine Wash and Dry * Wool Source: Australia * Imported. Features * Button-Up: Buttons up the front torso, with snaps on the lower half, extra button provided on care label * Rear Opening: Low profile, snap opening * Neckline: Henley Y-Neck * Thumbholes: Allow for easy layering and added hand warmth * Waistband: Adjustable drawcord * Ribbed Ankle Cuffs: Keep in place and allow for easy layering * Tagless Label: No Itchy Neck Tags * Flat Lock Seams: Prevents Chafing * Layer Type: Base Layer, Mid Layer * Fit Type: Regular - Standard fit with a little bit of room to breathe, but not too baggy * Model Features: The model in true red is 5'10 / 150 lbs wearing a medium * Weight: Size Large = 21.6 oz. (612 grams) * Style #: 4920 Uses * Ideal Seasons: Spring, Fall, Winter * Activities: Everyday Wear, Hiking, Camping, Biking, Running, Fishing, Hunting, Snowsports * Temperature Recommendations: 30°F to 0°F while active, 30°F to 60°F while inactive - Learn More Care Washing and Drying Instructions - Learn More * Turn Inside Out * Machine Wash Cold: Gentle cycle with like colors * Detergent: Mild or wool-specific * Tumble Dry: Low heat * Storage: Place in an airtight container when not in use for long periods of time * Do NOT Use: Fabric softener or bleach!