Arctic Shield Heat Echo Sherpa Bib. This 100percent waterproof windproof and breathable bib is perfect for the active hunter. It's designed and created with Retain? Active heat technology plus synthetic insulation for added warmth and the outershell is quiet - perfect for the stealthy whitetail hunter who wants to remain unheard and unseen. Specifications for Arctic Shield Heat Echo Sherpa Bib: Manufacturer: Arctic Shield Gender: Male Age Group: Adults Additional Features: No Weight: 3.31 lb Width: 15 in Package Contents: Arctic Shield Heat Echo Sherpa Bib