COSTUME GALLERY
1) Solo’s original costume was a green body suit covering him from the neck down. He wore a mask which left the top of his head exposed. This basic costume was accentuated by lime green pouches, bandoliers and strap-on weapons at various points on his person. His belt had a target crosshairs as its design, though it was sometimes tilted enough to be mistaken for a mutant team's "X" insignia. [Amazing Spider-Man (1st series) #323]
(Technically, Solo may have worn this costume in his first appearance from Web of Spider-Man #19, but he only appeared in a single, heavily-shadowed panel.)
2) When he joined the Six Pack, Solo kept the basic arrangement of his costume, with a green suit peppered by an arrangement of pouches and bandoliers, now mostly colored in yellow. He wore a set of wraparound goggles in place of his previous mask. [Cable / Deadpool #7]
3) Solo became a Deadpool impersonator to charge higher for his mercenary jobs, and this inspired the real Deadpool to build his Mercs for Money as an entire team of Deadpool franchises. [Deadpool (5th series) #1]
Solo initially wore Deadpool’s traditional red and black costume before a violent imposter started haunting Deadpool in that uniform. The Mercs briefly switched to color-coordinated uniforms (with Solo’s being green instead of red) before Wade gave up on the idea altogether. [Deadpool (5th series) #4-5]
4) Solo discarded the Deadpool uniform and returned to the updated look he had adopted shortly before joining the Mercs for Money. A version of his old green costume, this suit had a brown mask and other brown elements including a tactical vest, shoulder pads, belt and holster. Variations of this suit went back to using his traditional full green instead of brown. [Deadpool (5th series) #7]