[Freely Adjustable-Metal connectors ]: 360 rotatable metal connectors 360 swivel connector allows toddlers to walk even run freely It could protect the baby away from twisting the wrist,the toddler leash shoulder straps are freely adjustableto fit most for kids 2 years old to 4 year old child or older child, it can be adjusted according to childrens need, and greatly ease the pressure on the shoulders[Breathable fabric soft Cushion] : Bracelet are made of high quality cotton, it is breathable and anti-friction. the soft breathable sponge pad in the baby wrist strap and toddler backpack leash ,use widening car seat belt material make it comfortable to wear for both adult and kids[Safety Material-Excellent Quality]: We made it of high-quality materials, with durable and robust metal rotatable Metal connectors The anti lost wrist link is made up of stainless steel wire and PU material has good elasticity,enough to withstand daily twisting and pulling not easy to fracture.