Fitmus Strength leather Sandbag Materiails is PVC leather with net and pu waterproof      top quality
Handle:soft rubber with encryption nylon straps
Copper buckle no the common iron buckle
All straps use encryption ribbon more robust
Seven rubber handles more reasonably
YKK zipper                              
 - Weight after fill sand                                                  
40lb  core sandbag                                                  
 80lb  core sandbag                                                      
120lb  core sandbag
 Sandbag is one of the most simple and yet the most effective strength training implements out there