It has 2 surface?front is alloy for summer use? back is leater material for winter use can?be?used?in?summer?and?winter You?will?have?cool?feeling?when?use?the?aluminium?alloy?side?in?summer??and?will?feel?warm?if?use?the?leather?side?in?winter Surface Protection rubberized base provides heavy grip and security? it protects a desktop from scratches and the aluminum won't absorb liquid? making it resistant to spills. Sleek Looking: classy and fashionable? slim and light? much harmonious with MacBook? computer and laptops; Smooth Surface: smooth and delicate surface provides more light emission rules to ensure smooth sliding and precise mouse positioning for great mouse performance; Strong Construction: the aluminum mouse pad is a highly stylish mouse pad? which made out of aluminum? it can durable enough to withstand long hours of gaming? working? studying? and more Item Weight : about 250g Diameter:220mm Color: Silver?Grey?Golden?Rose-Golden Thickness:3mm(metal is 2.5mm?leather is 0.5mm)                |