This innovative product comes in a range of sizes and uses gentle pressure to reduce anxiety in dogs. This concept has been used effectively in both people and is a great drug-free way to create a sense of calm in your pet even during stressful situations. Requires no training. XXS <12lbs, XS 10-18lbs, S 15-25lbs, M 20-50lbs, L 40-70lbs, XL 60-100lbs, XXL >90lbs.