Doggles ILS new patented interchangeable lens system for dogs is the ultimate in Doggles! Doggles ILS offers a deeper lens cup, very flexible frame, and wider nose bridge. ILS were designed from the beginning to be lighter and more comfortable for dogs. After eight years of designing eyewear for dogs, Doggles ILS has arrived. Change your lens color anytime you want - for fashion or function. As with all Doggles, goggles for dogs, you still get the 100% UV protection, shatterproof, anti-fog lenses which Doggles are known for! Size Dog Size Back Strap / Frame Length Chin Strap Length Actual Lens Size Extra Small 1-10 lbs .5-5 kg 5-13 in 13-33 cm 3-7 in 8-17 cm 1 X 1.25 in 2.5 X 3.2 cm Small 9-25 lbs 4-12 kg 12-20 in 30-50 cm 4-8 in 10-20 cm 1.5 X 2 in 3.8 X 5.1 cm Medium 20-60 lbs 9-27 kg 15-25 in 38-63 cm 5-11 in 13-28 cm 1.5 X 2.25 in 3.8 X 5.7 cm Large 50-90 lbs 22-41 kg 18-30 in 46-76 cm 6-15 in 15-38 cm 2 X 3 in 3.8 X 6.4 cm
