Whether preventing ice-balls from forming between your pup's toes, protecting their paws from rocky trails during hikes, or keeping their little feeties off cold, salty sidewalks, our booties are designed with all seasons in mind. We teamed up with veteran sled dog racers in the USA to make the same booties their sled dogs wear. Sold in sets of four or individually for replacements as needed Lightweight breathable cotton-poly fabric Grippy rubber bottom Hook & loop closure straps Mesh storage bag included Sizing Small - 2.5" wide x 5 ¼ " tall Medium - 3" wide x 5½" tall Large - 3.5" wide x 5?" tall Choose the size that is an inch bigger than the width of your dogs foot for proper fit. Measure the foot at the widest spot while your dog is standing with weight on the foot. Recommended Use Be sure to measure before ordering to ensure the best fit and tighten the straps super snug. The booties can be used for summer walks - they do provide some barrier between paws and the ground - but always do the 8 second touch test before taking your pup out on hot days. If you don't want to keep the back of your hand on the ground for 8 seconds due to heat, schedule your walk for later in the day when it's cooler out.