FCUK for Men keeps your sizing consistent. Once you have found your fit within a brand, re-ordering stops being a gamble and takes thirty seconds.
At Underlinen you can buy FCUK innerwear online from FCUK. The range also covers PUMA and French Connection.
Everything here is sourced direct, so what arrives is what the brand made.
Why it matters
What shopping one brand actually does
This is the full range Underlinen stocks from one of its genuine brands: sourced directly and guaranteed authentic, across every category we carry it in. Shop the brand you already trust in one place.
// SIZING YOU ALREADY KNOW
Sizing you already know
Within one brand the fit stays consistent, so once you have found your size, re-ordering stops being a gamble.
// ONE PLACE FOR THE WHOLE DRAWER
One place for the whole drawer
Innerwear, socks and loungewear from a brand you already get on with, without cross-checking size charts.
// GENUINE, SOURCED DIRECT
Genuine, sourced direct
Everything here comes direct. There is no grey-market stock and no guessing whether a pack is real.
// EASY TO REPEAT
Easy to repeat
When something works, buying it again should take thirty seconds. That is what a single brand page is for.
The buying guide
How to choose FCUK for Men
Shopping a full brand range lets you: A quick, honest guide so you buy once and buy right.
// STAY CONSISTENT
Stay consistent
Keep your innerwear, socks and loungewear from one brand you already get on with.
// BUY WITH CONFIDENCE
Buy with confidence
Every piece is 100% genuine and sourced direct.
// FIND YOUR FIT ONCE
Find your fit once
Sizing stays consistent within a brand, so re-ordering is easy.
When to wear it
When to stay with one brand
Same category, different jobs. Here is where each one earns its place.
// RESTOCKING
Restocking
The fastest way to re-order is to go back to the brand that already fits.
// GIFTING
Gifting
A brand someone already wears takes the guesswork out.
// TRYING SOMETHING NEW
Trying something new
Staying inside a brand you trust is the low-risk way to try a cut you have not worn before.
Sizing
Getting the size right
Size is the one thing worth getting right before you order. Three things that make it a one-time decision.
// MEASURE, DON'T GUESS
Measure, don't guess
Take a tape around the fullest part of the chest for tops and around the natural waist for bottoms, and read the chart on the product page against that.
// SIZES DIFFER BETWEEN BRANDS
Sizes differ between brands
The size on your last pair is not a size, it is that brand's size. Check the chart every time you buy from a brand you have not bought before.
// SNUG, NOT TIGHT
Snug, not tight
This layer works by sitting close. If it marks the skin it is too small; if it moves around under a shirt it is too big.
Care
Making them last
Most innerwear does not wear out. It gets washed out. Six habits that add months to anything in this range.
•Wash cold. Hot water is what shortens the life of anything worn every day.
•Keep fabric softener away from elastic waistbands and cuffs: it is what tires them out.
•Turn prints and darks inside out before washing to protect the colour.
•Dry in shade rather than direct sun, which fades colour and stiffens fabric.
•Skip the hot tumble dry. Heat is the single biggest cause of shrinkage and lost stretch.
•Own enough to rotate. Anything worn and washed daily lasts longer in a set than on its own.
Questions, answered
The things men actually ask before buying
Yes. Underlinen is an authorised multi-brand store and every piece on this page is sourced directly from the brand.
Within one brand, yes: which is why buying a full range from a brand you already get on with makes re-ordering easy. Check the size chart on each product page.
Wash cold, keep fabric softener away from any elastic waistband, and dry in shade. That keeps the fit and the colour far longer than a hot wash and a tumble dry.
If you wear them daily, plan on refreshing every six to nine months. Elastic is what goes first: long before the fabric looks worn out.
Yes. Orders are usually processed within one business day and delivered within 2 to 7 business days. Remote locations can take a little longer.