Using these insoles is easy. First, take out the existing removable liner from your roomy hiking boots or outdoor footwear. Then, place the Superfeet Hike Cushion insoles in their place. Trim them according to your shoe size if needed. Remember to keep your insoles dry. After a long hike, let them air - dry to maintain their shape and performance. Also, don't use harsh chemicals to clean them as it may damage the patented Adaptive Comfort Technology. With proper care, these insoles will keep you comfortable on your outdoor adventures for a long time.