Moderate thickness, moderate air permeability, good warmth retention. Bring warm to you in the cold winter. The products are made of high-grade material, which is supple, healthy and comfortable. The sleeves are lightweight, and they are easy for you to carry and wear. Features -Color:Assorted Color -Material:Acrylic Fibers, Polyester -Size:30.00X8.00X1.00cm/11.79X3.14X0.39in - The arm sleeves are durable and practical, which will not be easily damaged. The sleeves have a strong warmth function, can help you spend a cold winter. - Thumb hole design fingerless cuff allows your fingers to move more flexibly, simple but classic, for you to provide a good use experience. - You can send them to your families and friends as gifts, they will be happy. - Easy to maintain, they are easy to clean, even if they are dirty, don't worry. - Though the sleeves are simple in design, they are practical when use them. Package list: 4 x Pairs of Arm Sleeves