KEEP YOUR ARM WARM: Cycling arm sleeves made of soft thermal fleece material, it will protect your arm well and keep warm in Autumn or Cold winter while you are cycling running gym or outwork. The arm warmers can be removed easily and put it in your pocket when your arms get hot SOFT & BREATHABLE: Comfortable and delicate Thermal fleece lining retains arms heat, fabric that has a soft brushed inside to wick moisture while retaining heat.In addition, to make it more breathable, we added a spliced breathable fabric design at the arm joints part. Our careful design will give you a different comfort experience UPGRADE NON-SLIP BAND: To wear them for a long time without falling off, we add anti-slip highly elastic band which add high-quality silicone on the top of full long leg sleeves, it can hold up the position all the time.Whats more, no worry that it will too tight to affect the blood circulation in your upper arm H ELASTICITY & SUPER STRETCHY: Our winter arm sleeve is made of thermal fleece lining & spandex,the fabric is high stretchy, making the sleeves easy to put on and remove. Beside, there are there sizes to choose, Please choose your suitable size according to measurement your arm circumference FI ALL KINDS OF ACTIVITY: FI ALL KINDS OF ACTIVITY: Cycling arm warmers are great for men women in the fall or early winter. These do a great job of cutting the cold in the brisk, damp mornings.our thermal arm sleeves will keep you warm whether you're running,playing basketball, cycling, gym or even football. This will be sweet gifts for your dear friends or family