What tools, food, supplies, gear would you recommend a person hiking up a smokey, tropical, cold mountain by himself starting at 5am planning on going to the top and then back down the same day?
All experienced answers welcome !

I’m going to hike the 22-mile (35½ kilometre) Mourne Wall next week. It has been described as “one of the greatest mountain walks in Ireland”, but is a tough mountainous walk with some very steep and rocky slopes, along with some wet and boggy patches.
I already have (I think) everything I need, but just in [...]

we are going mt. Kinabalu next week, any suggestion for gears and stuffs?