Mayfly Open Window (original artwork)

Price reduced on 'original artwork' open windows! Same great circuit and warranty as the current production open window, but price reduced because of the older-style artwork.

The Mayfly Open Window is a transparent overdrive that gives you more of what you like of your current rig without screwing up the tone of your guitar or amp. Set it for just a little bit of breakup, or crank it up for a big overdrive sound. Asymmetric clipping for overdrive without fizzyness. Flexible EQ for perfectly dialling in the character of the sound. High headroom design with internally generated 18V power allowing you to push high levels into it without fear of it crapping out, or use it to boost something downstream. Full bypass using fail-safe relay switching.  Made in Canada. 

 - it sounds better than any other overdrive!