Abstract: A portable seat is constructed of a thin, lightweight, shell of Goretex material and then lined with Thinsulate material or some similar heat retaining fabric. The waterproof seat is attachable by VELCRO fabric fasteners or a belt to the seat portion of a user's trousers, and is particularly useful on ski lifts and the like. When not being used, the seat can be folded and stored in a small pouch. A modified embodiment of the seat employs an inflatable cushion with its comfort being adjustable through the use of further inflatable coiled springs positioned within the main cushion. Both the main seat cushion and each of the inflatable springs may be independently inflated to adjust comfort.