Warm dry hands=Happy Kids!These Barts Kids Warm Mittens are made from water resistant nylon with a rubber tec palm for better grip.They are fleece lined making them warm and cosy. Size 1 has no thumb. Size1=Age 1/2 yrs. Size2=Age 2/3 yrs. Size3=Age 4/6 yrs. Size4=Age 6/8 yrs. Size5=Age 8/10yrs.