The long type can cover the sleeve even the cuffs. 
The patented material is "Nitrile Rubber with the characteristics of natural rubber. 
Patent No. P2008-545814A; Stretches (1.5 times more than conventional nitrile gloves) for superior maneuverability. 
The material is resistant to stuffiness even when worn for a long time. 
It has excellent penetration strength, so it is recommended for animal experiments.