Here's what I found with google:
Thermoformed Composite System (TCSª)
This is a breakthrough technology we've developed for our line of recreational touring kayaks. Our TCSª kayaks are made with high-performance thermoplastic sheets which, with the careful application of heat and vacuum, creates a kayak that outperforms most other plastic models. The sheets are made of co-extruded high impact acrylic over premium impact ABS. They feature the high gloss and light-weight of a traditional composite kayak, and the ruggedness of high impact plastic.
Compared to any polyethylene kayak, these hulls are stiffer, the material is three times harder, and has glossy, highly weatherable colors that resist fading. They also have higher heat resistance than polyethylene kayaks and will hold their shape, even in the hottest sun. TCS™ has terrific memory and readily springs back to its original shape after impacts (as with most plastics, temperatures approaching 0° F. will adversely affect its resiliency.) TCS™ kayaks are built with UV inhibitors and the deep gloss colors look great for years to come.
Rotational molding
Rotational molding uses high temperature to melt polyethylene powder in a closed rotating metal mold to produce a complete kayak hull and deck in a fraction of the time required for other construction methods. Our rotomolded polyethylene models offer paddlers the ability to enjoy many of the unique benefits of our designs at a economical price.
We've taken rotomolding to the next level with our own high-tech process controls to produce the lightest possible rotomolded kayaks. We use linear high density polyethylene in all of our rotomolded models to maximize stiffness without sacrificing impact strength. Our polyethylene maintains its integrity over a broad temperature range and has added stabilizers giving it increased protection from harmful ultraviolet rays.
Basically, you are going to get a higher performance, lighter, more durable boat that's still made of plastic. It will be more expensive than a Rotomold boat, but not as light as a composite boat (kevlar, etc.). TCS will be a better boat if you can afford to spring for it, but if not a regular Rotomold boat will serve you well too.