MTB nettle and bramble protection

[AW10]

Any suggestions on protection against nettles and brambles? I know I could MTFU but it's not the stinging that bothers me - it's my shins looking like they've been gone over with wire brush that is not my idea of fun. Long MTB trousers will probably be too warm 6+ months of the year so a solution that helps me keep cool is preferred. Would be grateful for ideas.