While it may not be a necessity for every traveler, a portable collapsible stool provides a lightweight, compact, and adjustable seating option for a wide range of indoor and outdoor activities like fishing and hiking. These seats offer comfort and convenience without the bulk of traditional chairs. Their benefits include ease of transport with shoulder straps or bags, stable and durable construction, and versatile height adjustment to suit different needs. Various designs and options exist, and a few options are listed below.
Here is an Amazon Link to a highly-rated product from Boreeman.
Here is an Amazon Link to another highly-rated option from the The Travel Chair Store.
If you need a device that can serve as both a walking cane and a folding seat, consider the 2-in-1 Cane Stool from Alevmoom (Amazon Link). An upgraded model addressed previous customer complaints. This updated model comes with a carry/storage bag, weights only 2.75 pounds, supports up to 550 pounds, and when used as a cane, the adjustable height is 34.2 - 37.4 inches. One downside is the minimum, collapsible height could present a challenge fitting in luggage.
Note: A cane can be taken through airport security and onto a plane as it is an essential mobility aid and is TSA-approved, but it will be subject to screening. An Amazon customer review indicated the Alevmoom 2-in-1 Cane Stool posed no issue going through TSA screening.
A similar, highly rated cane stool is made by Step2Gold (Amazon Link), but supports less weight than the Alevmoom version and presents the same challenges with fitting in luggage.
