Inline Skates are designed for use on a smooth surface that is free from sand and dirt. Inline skating, like most sports, involves risk. In order to minimise that risk, you should observe the safety precautions in this manual. When making your purchase, you should choose the appropriate Inline skate for you - based on your shoe size, weight, skill level and use. Size 34-37 and 38-41: designed for user weight 20 – 100 kg; Class A. Size 30-33: designed for user weight 20-60kg; Class B.