As mentioned TJ2 is a rebranded inkjet transfer paper, unlike sublimation it does have hand (which is gone after a few washes) and leaves a slight "window" since it is a clear polymer that sits on top of the tshirt.
One Step Papers
"One Step" makes the "Transjet2" paper for Airwaves, and has been around a long time using other names.
Sublimation tshirts have no hand and no window, but instead of using a tshirt that costs $1.50 you have to use a $5 - $6 100% polyester tshirt.
JPSS (Jet Pro Soft Stretch) is a good paper, it loses it's hand after the 1st wash and leaves virtually no "window" on white. All inkjet polymer transfer papers have a "window" and will show up on light colors. For white tshirts some transfer paper brands have less "window" than others, JPSS is the best in that respect. JPSS is harder to apply and does not work as well on 100% cotton.
I use both papers, depends on what I need at the time. Both have me covered.
I don't offer light color tshirts except for sublimation due to the "window". Since JPSS came out I do a lot less white tshirt sublimation. If you have a design that has open white space then you need to either sublimate, use a cutter for the inkjet transfer, or on whites you can use JPSS if you have an design with open white space.
If your design is a solid shape then not sublimating and using a quality inkjet paper is a good option and much cheaper.