Sun hats with rim all round or peak.
Sun glasses with good UV protection.
A cotton scarf to protect neck from sun burn,
light cotton shirts in neutral bush colors – short sleeves + long sleeve (avoid blue colors),
medium type fleece for the evenings,
light weight rain-jacket,
shorts; zip-off trousers are very good they are light and dry very quick and convenient if you like to change to shorts,
casual smart clothing for the evenings when staying in lodges / tented camps,
sensible walking shoes or trainers are fine, sport sandals also useful,
torch (flash light); head torches are very handy.