FirstLight® is advertised here as the world’s lightest folding kayak.
Weight is a far more important factor to me than seaworthiness. I want to hike in, paddle out. That kind of trip.
Weighing a mere 17.6 and 19.8 lbs, these amazing touring kayaks are incredibly light, yet fully seaworthy. Fast and lively, they allow excellent paddling speed & tracking.
FirstLight®-380: 23â€x12’6â€, 17.6 lbs., 238 lbs. capacity
$3095FirstLight®-420: 23â€x13’9â€, 19.8 lbs., 253 lbs. capacity
$2895
Inflatable Kayaks, Canoes, Folding Kayak, Boat – Taiga Works, Vancouver, Canada
Leave a comment if you have any opinion on this product. Or know where I can get a used one for closer to $1000.
besthike.com 
Not sure where you can find one cheaper, but I do recommend the Advanced Elements AdvanceFrame or AdvanceFrame Expedition inflatable kayak. They cost far less and are a lot of fun.
Logic dictates that inflatable should be better than foldable for hikers.
ADVANCEDFRAME KAYAK :: AE1012-R is 36lbs (bit heavy to hike with)
http://www.advancedelements.com/advancedframe.html
Advanced Elements Advanced Frame Expedition – 42lbs
http://www.deepcovekayak.com/kayakshop/products.php?productID=273
For me weight is the biggest factor. I’m thinking 20lbs plus paddle and extras is about maximum for me.
Probably true. The can be a bit on the heavy side. But for a fun, easy to store, and high quality inflatable, these are great.