Adjustable hook & loop fastening tape design.Easy to make it tighter or looser, and they stay on while working out or after sweating.You can feel more heat on your arms.And you will see muscle definition, instead of usual fat-encased limbs. | The sauna heat arm belt could help you burn arm fat, make arms sweat like crazy,help eliminate sag of the upper arm,clean the toxins inside the body,and let you have a healthy body.And it will give you results in slimming down your arms if you do cardio and strength work on your arms to build muscle and tone up. | Makes your arms sweat, providing sauna effect especially when combine with hot sweat skin cream gel.The sport upper arm compression sleeve helps heat up the fat so that you can lose weight at a great speed.And weight reduction training armbands all keep the sweat inside and dry on the outside. | Comfortable to wear for arm training,running on the treadmill,weight lifting,exercising or fitness regime in the gym.Anti cellulite upper arm toner helps to increase circulation in the upper arms as a way to lose fat and inches during workouts.Give your workout that extra kick. | Note:there may be a smell like a rubber when the first use.But no worry,it's a normal thing from neoprene sauna product.After hand wash it with cool water and let it air out,the smell will be gone.Any questions,pls contact us first,we'll provide all customers guarantee for 100% satisfaction.