rainproof shelter

About noon — the sun was almost straight overhead — the clouds began to thicken and look dark. In moments it started to rain and he took what he had picked and trotted back to the shelter. He had eaten probably two pounds of raspberries and had maybe another three pounds in his jacket, rolled in a pouch.
  He made it to the shelter just as the clouds completely opened and the rain roared down in sheets. Soon the sand outside was drenched and there were rivulets running down to the lake. But inside he was dry and snug. He started to put the picked berries back in the sorted pile with the gut cherries but noticed that the raspberries were seeping through the jacket. They were much softer than the gut cherries and apparently were being crushed a bit with their own weight.