Length: 19.7-29.5 inches/50-75 cm, adjustable cap fit most adults Soft and Breathable: our helmet for elderly head protection adopts quality cotton and polyester, comfortable to wear and easy to clean, the inside material is mesh, soft and breathable, with high elastic sponge filling, can effectively absorb shock and reduce damage caused by head impact, offering you an effective head protection Extended Hook and Loop Design: this anti fall head protection helmet adopts an extended hook and loop design, making it easy to use, and the adjustable range is increased, which can be stretched and pasted repeatedly, allowing you to adjust it to the most suitable size for the head circumference Thoughtful and Practical: the top of this protective cap for head is hollow, so you will not feel stuffy even in the hot summer, the adjustable strap makes it more convenient to fix and use, providing you with a nice wearing experience while helping to keep your head safe Multiple Functional: our head protector for adults can not only offer protection to the elderly with limited mobility and get head injuries due to falls, but also can avoid secondary head injuries for patients, practical and multifunctional