Above are images of the Sliders crew sweatshirts. These were given out at Christmas in their respective years of production. The top images (with the purple logo and hood) were given out as part of season four production. The difference between the two is that the jacket on the right side had a zipper down the front and interior lining which made it into more of a light-weight jacket. The top image had no zipper and would be considered more of a pull over sweatshirt with a hood.
The jacket in the bottom images (with silver logo and no hood) was given out as part of season five production. As you can see, it matches the ball caps that were given out...but only those who were there for seasons three, four and five would have matched sets due to the manner in which they were given out (see the Crew Cap section for details).