A is for Aviators. If you're ever in doubt about sunglasses, go with old faithful.
B is for Baseball Cap. Back in style, but make sure it's premium. Ami, Kitsune and Whistles worth considering.
C is for Camp Collar. No summer wardrobe is complete without a camp collar shirt. Reiss does a good line, but almost every brand has produced one for the season.
D is for Desert Boots. Sand-coloured, worn with cropped trousers and a shirt. You can't go wrong.
E is for Eau de Parfum. Get your summer fragrance nailed now. Made in conjunction with Turnbull & Asser, Floris' new 71/72 is an exercise in olfactory elegance.
F is for Field Jacket. Ideally an original M65, but this one from Abercrombie & Fitch is a fine modern equivalent. Wear it with white trousers. Go on, we dare you.
G is for Granddad Collar Shirt. A must for the summer. Be inspired by Peaky Blinders and wear this one by Topman as the base of a layered up look.
H is for Hand Luggage. Lugging massive suitcases around is a chore, so pick a few key pieces, pack light and enjoy streamlined holidaying. Eastpak's new premium collection is sleek, super tough and each case comes with a removable wash bag. Handy, eh?
I is for Invisible Socks. No one can see them, no one will judge you and no one can smell your feet.
J is for Jelly Shoes. Never wear fucking jelly shoes. The same goes for Fedoras, banana hammocks, scoop neck Tees and bootcut jeans. If your wardrobe contains any of the above then you need to take a long hard look in the mirror.
K is for Knitwear. Just because it's warm doesn't mean you need to ditch the wool. A crew neck sweater in light merino or cashmere is a year-round staple.
L is for Linen. Thanks to its breathability, linen comes into its own in the summer, but it has a tendency to crease, so get pieces that are mixed with cotton or silk, pieces such as this shirt from H&M.
M is for Moisturiser. Don't worry, we're not suggesting you don't use one already. But does yours contain SPF protection? Well, it should.
N is for Nato Strap Watch. Leather and metal can get hot and uncomfortable on your wrist in warmer weather, but a fabric Nato strap is as permanently comfortable as it is eternally cool. For proof, see Tudor's Black Bay range.
O is for Oxford. If ever in doubt, no matter the occasion, a crisp white button-down will always suffice. Especially this one from Gant.
Q is for Quilted Coat. No, not those boxy, oversized, musty smelling ones people wear in the country. We mean light, technical outerwear, like this from Patagonia. Good for late nights at the beach.
R is for Runway. We're less than a fortnight away from the men's shows in London, Paris and Milan and the best inside track can be found right here at esquire.co.uk. We'll be running our usual live blog, plus the editors' video diary. It all kicks of on 10 June.
S is for Seersucker. The summer fabric. Invest in a blazer (or even better, a full suit) for wedding season. If there's a best-dressed-guest award, it's in the bag. Head to John Lewis for affordably priced summer tailoring.
T is for Tennis Shoes. Think Seventies-inspired, off-white with occasional touches of suede. Think these by Swedish shoe brand CQP.
U is for Unlined, as in jacket. Your best friend this summer (and every summer going forward) is an unlined, unstructured blazer. J Crew has a range at very accessible prices.
V is for Vest. Worn under the aforementioned camp collar shirt. The best we've seen is this cellular number by Sunspel – the open knit is perfect for hot weather.
W is for Work Wear. Less steel toecaps and utility belts, more square cut over shirts and hefty denim. Still not sure, then stop in to Albam's new store in Covent Garden.
X is for eXperimentation (you try finding a relevant word that starts with X…) Try new shades (pastels, maybe), new cuts (billowy, perhaps) and new accessories (no Fedoras though, obviously).
Y is for Yacht. You might well find yourself on the high seas this summer, and it's easy to dress like a wanker. If in doubt; grab a linen shirt or Breton tee, some easy-to-wear tailored shorts and good quality boat shoes, like these from Timberland.
Z is for Zenith. If you think you've seen too many guys following a trend, it's already too late to join in. Forge your own path.