It's a trim-fitting insulating jacket that can be worn as a layer under a hard shell to provide warmth, or by itself as a wind and water-resistant jacket.
这是一件剪裁修身的夹克，可以穿在硬壳里面作为保温层，当然，本身也可以作为一件防风防水的夹克。
3
We have to have some basic things such as wind-preferably a down jacket climbing boots alpenstock piton hammer and mylon climbing rope.