Add more weight resistance to your UniVest weighted vest with this compatible package of 10 qty. 0.5-lb. weights. UniVests are capable of supporting double the weight of the base model, i.e. the 10-lb. weight vest can increase weight to 20 lbs., and the 20-lb. weight vest can increase weight to 40 lbs. Fast shipping to the lower 48 United States for this package of additional weights.