I don't know why you persist in wearing those old oilskins for fishing, when you can get nylon jackets that are waterproof, windproof, and light as a feather.
我不清楚你为什么一定要穿这身旧的油布衣裤去打鱼，你是能搞到防水挡风、分量很轻的尼龙衣的。
详细解释：
wind.proof adj.（形容词）Impervious to or resistant to wind:防风的，不透风的：风不能透过的或是可抵抗风的：例句：a windproof jacket.防风夹克