Rockbros arm covers. I'm selling them because the size is a bit tight for me. They're very cooling and prevent sunburn, so they're also recommended for driving. Size: S Size details: Length: 40cm Wrist side: 13.5cm Arm side: 22.85cm #armsleeves #summer sports #golf #cycling #baseball #unisex #sweat-wicking They cost about ¥1,700.