Developed by a veterinarian, Soft Paws nail caps are made in the USA using non-toxic vinyl. The nail caps are applied to your cat's claws using a non-toxic, cold-bonding, veterinary-grade adhesive, and are a completely safe and humane solution to cat scratching problems. Soft Paws do not interfere with the normal extension and retraction of claws, and most cats don't even know they are wearing them. Each Soft Paws® kit contains 40 nail caps, 2 tubes of adhesive, applicator tips, and easy-to-follow instructions. One kit contains enough for 4 front paw applications and each application lasts approximately 4 to 6 weeks, which makes each kit lasts approximately 4 to 6 months.