注：vernice是Prada的一款皮包
Vernice is important in this season. There are many groups featured in patent leather including this one, entirely made in lambskin which is, to be used usually on ready-to-wear & gloves, to keep the softness of the bag.
请详细解析第二句的成分

感觉缺少背景，只好根据理解猜测一下：
Vernice是Prada的一个系列，这段文章是介绍Vernice系列中的一款（估计旁边有这款产品的配图）。

如果以上猜测没错的话，翻译如下：
Vernice是本季的亮点，多款均以漆皮为特色，全以小羊皮制成的本款产品便是其中之一。通常用于成品服饰和手套的小羊皮用以保持本款手袋的柔软。

先看这个句子的主干：There are many groups (featured in patent leather) including this one，其中featured in patent leather修饰groups。多款均以漆皮为特色，本款便是其中之一。

entirely made in lambskin修饰this one。本款全用小羊皮制成。

which从句修饰lambskin。先将这个复原为正常语序：Lambskin, (to be used usually on ready-to-wear & gloves), is to keep the softness of the bag。括号内的成分是不定式定语，修饰lambskin。通常用于成品服饰和手套的小羊皮用以保持本款手袋的柔软。