The handles are ergonomically designed and made from foams with just the right firmness. During your movement, the majority of your weight is on your hands, it is so essential to have comfort grips so that you can enjoy the pain that is turning your belly fat into 6 pack muscles without irritating your hands. Ab roller is wrapped around by top quality tyre. The abdominal wheel tread allows the ab roller to roll smoothly on most surfaces with minimal noise level. abs exercise equipment makes great fitness gifts for any family friends even kids (use with supervision). stomach fitness roller is an essential home workout equipment for women and men. double-wheel setting ab machine gives greater balance and control, making it perfect for beginners. This setting primarily engages the most important muscles of the core: the rectus abdominis - this muscle makes up the often sought-after "six pack abs" (or ). ab wheel is a great weight loss equipment for home and fitness equipment for home gym. As you progress to single-wheel setting, abs roller wheel allows you to engage other muscles including transverse abdominis (the TVA muscles), shoulder muscles, back muscles, forearms and other core muscles. The more unstable it is, the more muscle groups it engages. The two settings ultimately complement each other to help you achieve all your training goals in a more efficient way. exercise roller is a great piece of fitness gym equipment for home gym. This Ab trimmer can be an perfect addition to your weight loss equipment kit. Colour:black Material:ABS+metal Size:32cm Package Contents: 1 set x Ab Roller Wheel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.