Recommended Uses Reducing pulling and strain on both ends of the leash Outdoor adventures in any weather Daily walks, runs, and training sessions Escape-prone dogs who need a reliable, snug fit Fitment & Compatibility Guide Before ordering the Blue 9 Pet Products, Balance Harness, review its listed measurements and weight limits against your pet's size. You should fit two fingers under any properly adjusted strap. Re-check fit monthly for puppies and young dogs who are still growing. Measure the neck at its base, using a soft tape measure held snug but not tight. Care & Maintenance Inspect straps and stitching monthly for early signs of wear. Rinse after beach or pool trips to remove salt and chlorine. Hand wash with mild soap and air dry to preserve webbing and stitching. Store flat or hung rather than crumpled to keep shapes crisp. Frequently Asked Questions Does it require assembly or setup? Any setup is straightforward - see the features section above. Most owners are ready to use it within minutes of unboxing. Does it hold up in rain or mud? Rinse off dirt and let it air dry after messy outings; the materials are selected for everyday weather - see care notes above. Can my dog wear it all day? It's designed for walks and activity; for extended wear, check periodically for rubbing or irritation during the first week. About Blue-9 Pet Products Blue-9 Pet Products, founded in Iowa, builds training and control gear that's trusted by professional K9 trainers, veterinarians, and competition handlers. Their KLIMB® training platform - launched in 2014 and honored with a Pet Product News Editor's Choice Award - and veterinarian-approved Balance Harness® reflect an obsessive attention to detail, with nearly all products proudly made in the USA. Sizing RIBCAGE MEASUREMENT SIZE STRAP WIDTH13.5” to 18” XS 5/8”17.5” to 25.5” S 5/8”21” to 32” M 3/4”24” to 35.5” M/L 1”29” to 43.5” L 1”