The Rossignol R18 Kids Ski Boots in size Mondo 21.5 are designed specifically for young skiers with a flex suitable for beginners. These multicolored boots feature a soft flex to provide comfort and support for young skiers. The Rossignol brand is known for producing high-quality ski equipment, and the R18 model is geared towards alpine/downhill skiing activities. With a BSL of 264mm, these ski boots are ideal for providing a stable and secure fit for young skiers looking to improve their skills on the slopes.