This product has personal design in six structures: ①The neck circumference is widened and won’t be too tight to the dog's neck or affect its breathing; ②The back buckle strap can be adjusted to suit dogs of different sizes; ③Shock-proof sponge is added to the abdomen to effectively protect dog chest from being squeezed; ④There is enough space in the abdomen for male dogs, which won’t interfere their urination; ⑤The circular sponge designed to legs avoids buttocks friction and leg pulling; ⑥Our slings from M size to XXL size are all equipped with assistance handles, proving additional assistance when you carry large dogs. For better using, you can try these ways of use: ①wear it cross-body ②wear it on shoulder ③use it as a leash (shoulder strap is adjustable) ④can be wore as anxiety vest ⑤can be used as a hanging hammock to trim your pet’s nails or for grooming.