The cool oversleeves are made of soft cool lextreme, with perfect UV protection. It has high resilience, one size fits all, product size 16"×4", can be stretched to 40"×6". During the Summer, heavy sunlight and UV are the biggest problems for outdoor and indoor activities. With the cool oversleeves, it is able to fight against 90% UV and keep your arms cool all the time. Customized logo can be put on the cuff of the sleeve.