John Peters invented the modern messenger bag in the 1980s after learning how to sew from his mother in rural New York, but even if his bag company Peters Mountain Works is grounded in that history and heritage, the company has really continued to push things forward with their collection of far-out packs in acid-y bright color ways and unique constructions that feel anything but retro. Spring 2014 finds them as playful as ever, like they grabbed a pink highlighter and felt free as a bird. These bags won't be for sale for some time now, but in the meantime, you can satiate yourself with a pretty great assortment over at Opening Ceremony.