A Coat for the Car, the Queue and the Corner Booth

There is a particular kind of winter coat that looks excellent in a fitting room. It has a clean line, a promising collar and a mirror that catches it at just the right angle. Then you take it home, wear it on a wet Tuesday, and discover that it rides up when you sit, traps your arm at the wheel, or leaves you wrestling a tote strap on the bus. The mirror is not the problem. The problem is that most of us try coats standing still.

A coat is not a photograph. It is a piece of equipment for a British winter: a shelter you wear while queuing, driving, climbing stairs, carrying too much and sitting down in places that were not designed for a long hem. So before you commit this season, give a coat the life it is actually going to have. Use the fitting room, but use it properly.

Start with the sit

Do not just stand there and swivel. Sit down. Ideally on the fitting-room bench, a low chair, or the slightly awkward stool by the till. Sit the way you actually sit: knees together, then crossed, then with one ankle tucked under. Lean forward as if reaching for a coffee cup or a phone. This is where a winter coat tells the truth.

Watch the hem. A long coat should not pool on the floor when you sit, but it also should not bunch into a stiff shelf across your lap. A little extra length is useful; too much and you will be hitching it up every time you perch. Check the back rise too — does the coat pull down at the shoulders or ride up at the waist? If it does, you will feel it on every bus seat from now until March.

Then check the lining. A slippery lining helps a coat slide over knitwear, but it can also make the whole thing shift when you stand up. If the coat has a back vent, sit down and see whether it opens cleanly or stays clamped shut. A vent that does not vent is just a seam with ambitions.

The driving test

Even if you do not drive every day, try the driving position. Sit down, stretch both arms forward as if holding a wheel, and turn your head to check a blind spot. A good winter coat should let you do this without feeling like you are wearing a duvet with sleeves.

The shoulders are the first checkpoint. If the seam sits too far out, you will feel a pull across the back when you reach forward. If it sits too far in, the sleeve will twist. The sleeve length matters too: enough to cover your wrist when your arm is down, but not so much that it swallows your hand at ten to two. At Cocoon Boutique we look for coats that keep the shoulder soft and the armhole roomy enough for a mid-layer, because British winter dressing is rarely a one-layer operation.

Also think about the seatbelt. A bulky collar or a high, stiff zip can make the belt feel like it is sitting under your chin. Sit in the car, or mimic it on a chair, and check that you can turn your head without the collar fighting back.

The tote, the trolley and the queue

A winter coat has to carry things, or at least tolerate being worn while you carry them. Put your bag on your shoulder. Does the strap stay put, or does it slide down the coat's fabric every thirty seconds? If you carry a tote in the crook of your arm, does the coat's sleeve bunch up underneath? Try holding a shopping bag in each hand, then reach for a pretend card machine. If the coat restricts that small forward movement, it will annoy you at the till.

Pockets are part of this test. Put your phone in one, your hands in the other, and see whether the coat hangs differently. A pocket that pulls the front out of shape is not a pocket; it is a design flaw with a zip.

Stairs, steps and the short stride

Find a staircase, or at least a step. Climb it. A knee-length coat should clear the stair without you lifting it like a skirt. A longer coat may need a vent or a slightly narrower cut. Wide trousers and a long coat can be a lovely combination, but check that the two do not fight each other on the way up. If you have to hold the hem to climb a normal flight of stairs, the coat is not wrong — it is just wrong for you and your commute.

The corner-booth perch

This is the test people forget. Pub stools, high chairs and low sofas are where winter coats go to be judged. Sit on a stool and see where the hem lands. Does it slide off the back? Does the lining stick to your tights? Can you lean an elbow on the bar without the coat pulling across the back? A coat that works on a stool is a coat that will survive December.

The quick fitting-room checklist

• Sit down, cross your legs and lean forward. Check the hem, back and lining.
• Stretch your arms forward as if driving. Check the shoulders and sleeve length.
• Put a bag on your shoulder and a phone in each pocket. Check the drape.
• Climb a step or two. Check the vent and the stride.
• Perch on something high. Check the hem and the back.
• Look at the seams under the arms and across the shoulders. They should lie flat, not pull.
• Check the fabric against your hand. Does it feel warm but not heavy? Does it crease into a mess when you sit?
• Ask yourself where you will wear it most. If the answer is 'the car park, the bus and the pub', test it for those places, not for the mirror.

A winter coat should not be a standing ovation. It should be a quiet yes — the sort of coat you forget you are wearing because it lets you get on with the day. Try it sitting down. Then try it again.