Economy is the key to success. Such wisdom doesn't just apply to your financial wheelings-and-dealings, but also to your style stockpiling. Space is at a premium in the city, so it's important that we all become essentialists. Who wants to spend each and every morning rifling through their cavernous wardrobe like a granny at a jumble sale?

Follow our simple guide to your wardrobe essentials and you won't need to waste any more time rummaging. Today we're looking at man's best friend: sweaters and knitwear.

Every style conscious chap should have a range of pullovers he can whip out in his hour of need. It's the first thing you reach for and a good selection of knitwear can reveal the true spectrum of any gent's character. No guide would be complete without recommending a fitted black sweater, it's the John Wayne of your wardrobe, an absolute must you can trust. This black v-neck merino wool sweater from APC is simple, versatile and elegant - perfect to slip on with a pair of jeans to give your casual look a sharper edge. Adding a touch more vibrancy is this sultry, deep burgandy v-neck sweater from Roberto Collina - fabulously moody and - with a crisp white shirt - great for a night out.

Adding to your overall outfit options is the very purpose of the sweater and this tasteful charcoal stripy wool vest from Annapurna is a smart choice for a more relaxed day at the office. In contrast, this perfect metallic sweater with zip from Balenciaga is the ideal way to slide from this season to the next in tip-top style and can be worn with dark denim or trousers for a more formal look.

An absolute casual classic that your wardrobe cannot do without is this yellow and white stripy crew neck sweater from Rykiel Homme, weekend-wear for a totally relaxed and cooly subtle look.

With these simple recommendations, your knitwear will cover all the bases and be there just when you need it, whatever you need it for.