Portzon Weights Dumbbells 10 Colors Options Compatible with Set of 2 Neoprene Dumbbells Set,1-15 LB, Anti-Slip, Anti-roll, Hex ShapeMore process perfectMulti layered frame design with anti collision safety materials and impact absorption angle structure for superior protection against severe impacts and long lasting use of the weights. More ergonomicErgonomic handle with non slip grip design and high quality material coating for comfortable and sweat proof grip without causing calluses. More High quality materialMade of unique high quality rubber material that is smooth, non slip,