From the start we set out to make an euc pad that could be customized to the needs and imagination of all user types and be changed according to your style and riding preferences. the front and back of the pads have large flat surface to attach Velcro to that Oppens up all kinds of possibilities to mount lights, reflectors, bottle cages, pouches, molle panels,air compressors,speakers,camera mounts and almost anything with a flat surface. the side inserts can be changed as well and come with a design on one side and are flat on the other to adhere reflectors or stickers to for an even more personalized expireance. We are working on even more adapters and accessories coming soon.