Soft natural fabric on the outside and inside - perfect for sensitive pups with nylon allergies or chafing Nylon webbing core can withstand over one thousand pounds of pull Reinforced box stitches at all stress points Luxe metal hardware Made in the USA with love Please note: we do not recommend salt water exposure for our collar hardware. FIT AND SIZING Small Fits necks 11-16" 5/8" wide Weighs 2oz Medium Fits necks 14-19" 1" wide Weighs 4oz 100% cotton fabric exterior, nylon webbing interior Hardware: zinc alloy with a solid brass D-ring Hand wash or machine wash cold on delicate cycle inside a bag or pillowcase to protect the hardware. Air dry flat.