Sog E37-K Seal Pup Elite - Straight - Kydex Sheath. The SEAL Pup Elite is our high performance edition to the SEAL family of products. Sometimes... we just "have to have" more horsepower, the racing suspension, and every available option including sunroof. All kidding aside- the SEAL Pup Elite is serious business and carries on the tradition of supplying the worlds elite military forces.