4 in 1 Multifunctional Dumbbell SetWith it, you can get a pair of dumbbells also barbells, kettlebells, and push-up stands, which help you do many exercises including bench presses, squats, etc. Durable MaterialsEnvironmentally dumbbell pieces exterior is made of high-quality PE materials, and the inside is mixed with iron, mud, and sand, which effectively prevents floor abrasion. 20MM Thickened FoamThe connecting rod is made of a 5mm thick steel tube + 20mm thick high-quality foam. Curved design fits the neck, which is non-slip and sweat-absorbing, soft and breathable, bringing a more comfortable exercise experience to you. Non-slip Dumbbell BarThe surface of the dumbbell bar is made of ABS environmentally material and attached to a non-slip texture, which strengthens the friction of the hand and helps you control the dumbbell better during exercise.