Rivers used to do quite good crushed linen knee length pants for the tourist trade - elasticated top with a drawstring backup (which could be removed) with decent pockets and a drawstring tie just below each knee. Intended to be for summer, and wearable straight out of one’s suitcase. I got a couple of pairs and really like them for hot sticky weather. I also like that they don’t need ironing - and get softer and more comfy with each wash. Might be worth looking them up on line to see if they’re still available. I also like last year’s special at Aldi of knee length cargo pants in lightish cotton - baggy but the pockets are good and they are easy to wash and very comfy. I hate feeling sweaty in summer too.