Ice silk and modal both feel smooth, but they are different materials: ice silk is usually a synthetic polyamide and spandex blend with a slick, cool surface, while modal is a soft fibre made from wood pulp with a more cotton-like drape. Choose ice silk for a sleek feel and fast drying, and modal for relaxed softness on quieter days.
Neither one is actually silk
The word "silk" causes most of the confusion. Ice silk contains no silk from silkworms. It is a retail name for a fine, smooth knit, and the label tells you what it really is. Our compression boxer briefs, for example, are 89% polyamide and 11% spandex.
Modal is not silk either. It is a regenerated cellulose fibre, spun from wood pulp and often blended with a little stretch fibre. Shoppers group the two together because both feel silkier than ordinary cotton, yet they behave quite differently once you wear them.
If you want the background on the cooler option first, our ice silk underwear guide covers it in more depth.
Ice silk vs modal at a glance
| Quality | Ice silk | Modal |
|---|---|---|
| Typical make-up | Polyamide with spandex | Wood-pulp fibre, often with spandex |
| First touch | Slick and cool | Soft and slightly fuller |
| Look | Subtle sheen | More matte |
| Drying | Usually quicker | Usually a little slower |
| Best moment | Warm days, travel, training | Home, desk days, weekends |
Treat this as a general guide rather than a rule. Knit weight and the exact blend matter, so two garments with the same fabric name can still feel a little different.
How each fabric feels through the day
The difference shows up in small moments rather than on the shelf.
- Getting dressed: ice silk glides on and feels cool for the first few minutes. Modal feels gentle and familiar straight away.
- Under clothes: the slick surface of ice silk lets trousers slide over it easily, which suits slim cuts. Modal has a little more body and a softer hand.
- When you warm up: synthetic knits tend to let go of moisture faster. Modal takes moisture in readily, so it can feel a bit damper after a very active stretch.
- Winding down: this is where modal shines. On a sofa or a slow Sunday, its drape feels easy and unfussy.
Which one suits your day?
Most men do not need to pick a side permanently. It helps more to match the fabric to what you have planned. A drawer with a few pairs of each covers nearly every week, because busy days and slow days rarely ask for the same thing from your underwear.
Reach for ice silk when
- You are travelling and want pairs that dry quickly after a sink wash.
- The forecast is warm and you prefer a cool first touch.
- You are heading to the gym. Moisture-wicking, 4-way stretch pairs like the compression boxer briefs are made to move.
- You are wearing slim trousers and want a smooth layer beneath them.
Reach for modal when
- You spend the day at a desk or at home and comfort comes first.
- You like a soft, more matte look without shine.
- You find very slick fabrics a little too slippery.
For a wider comparison that brings cotton into the picture, read mesh vs cotton vs modal or our overview of soft underwear fabrics.
Cut matters as much as fabric
A great fabric cannot rescue the wrong shape, so check the construction too:
- Inseam: our Ice Silk Trunks have a short 3 in (7.6 cm) inseam and a low-rise cut, so they stay neat under most trousers.
- Pouch: the Ice Silk Trunks use a 3D U-pouch, while the modal trunks have a contour pouch with a soft, breathable inner lining.
- Finish: the modal trunks are tag-free with flat, smooth stitching, which keeps the softness uninterrupted.
- Style: ice silk is not limited to trunks. Our Silky Jockstrap comes in six solid colours, and the Silky Printed trunks come in ten patterns, from Leopard to Hummingbird.
Caring for both fabrics
Always follow the care label first. These general habits help smooth fabrics keep their feel:
- Wash with similar colours in a cool or gentle cycle.
- Use a laundry bag for fine knits, and keep them away from zips and hooks.
- Skip fabric softener, which can leave a coating on smooth fibres.
- Air dry where you can. Ice silk will often be ready sooner than modal.
Shop this guide
Frequently asked questions
Is ice silk real silk?
No. Ice silk is a name for a smooth synthetic knit. Check the label for the real make-up, which on our compression boxer briefs is 89% polyamide and 11% spandex.
Is modal softer than ice silk?
They are soft in different ways. Modal feels plush and cotton-like, while ice silk feels slick and cool. Which seems softer comes down to personal preference.
Which is better for hot weather?
Ice silk is usually the first choice thanks to its cool touch and quick drying, although light modal also works well on relaxed days.
Can I wear either one to the gym?
Ice silk with stretch is the more natural gym pick. Modal is better kept for lighter activity and everyday wear.
Find your smooth favourite
The easiest way to decide is to try one pair of each and notice which you reach for first. Browse the full silk-feel underwear collection or compare more cuts in our boxer briefs. Every order ships in discreet packaging.
