Medium Weight 100% Cotton Duck w/Durable Water Resistant Finish Medium Weight Fiberfill Insulation Corduroy Collar w/Concealed Snaps for Optional Hood Bi-Swing Action Back for More Flexibility Adjustable Leg Hem & Take-Up Snaps for Better Fit Double Knee Patches for Reinforcement Elastic Inserts at Back Waist Ankle to Hip Leg Zipper w/Unique Separate Pass Through Construction Scuff Guards on Legs Inside Mesh Cell Phone Pocket w/Hook n' Loop Closure & Storage Pocket Ruler & Pliers Pocket on Right Leg Cell Phone Pocket on Left Leg Triple Needle Stitching for Strength & Durability Pleated Elbows for Ease of Motion Additional Inside Storage Pocket Located at Right Side