Let the world know you are an Official Observer of Quantum mechanics with this 2.75 in (6.9 cm) hexagonal embroidered velcro backed patch. You can put it on a jacket, a bag, or frankly anywhere you are in the known universe because everywhere you go you are in fact an observer of quantum mechanics! 

This item has a limited inventory. Once inventory runs out, we will continue to sell the item via presale. Presale items may arrive after Dec. 25th due to  holiday shipping timelines.