any size chart to refer?

No, but it runs true to size. I am 6’1 and about 200lbs with an athletic build and I ordered a large. Fits me like a glove.

Can you wear these comfortably under work clothes?

Yes you can. This type is very soft lycra spandex with light fleece inside. It fits conform tight but no sense of constriction feel. It should last better than store bought lycra types under wear garment. It has no chamois but sill can be worn first under cycling shorts. Nominal rides hardly notice no chamois on the average and disclaimer of how accurate like riding with regular underwear.

Would these be a good alternative to ua cold gear? looking for the same outer texture.

It depends how cold you're talking about. I can only say that for someone who ordered a size that was perhaps slightly too big by one size, with things a little loose, it kept me decently warm in 43 F (6 Celsius) weather where I was just wearing a pear of shorts on the outside, and a t-shirt over the top. It probably was sufficient for roughly 30-45 minutes of being outside in that sort of weather before the cold started to pierce through a bit more but nothing unbearable. I would say maybe after an hour or two though I'd probably start to feel a shiver but can't say that from experience. I don't remember the humidity but if it helps those temperatures I mentioned were from when I wore these back in December while in Las Vegas. Hope that helps.

40" waist big thighs--what size worked for you? Thanks!

My sons size 38 waist and 225lbs we did XL. Might got up a size if your thighs are real big. But, he says perfect fit.

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mens B Soft

Product ID: 256161243

💧Advanced moisture-wicking tech

🔥Ultra-soft micro-fleece warmth

🧘‍♂️4-way stretch for full mobility

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AED 41

Duties & taxes included

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Description

🔥 Stay warm, move free, and never miss out on winter adventures!

TAGLESS COMFORT - No irritating labels and a lightweight, tagless elastic waistband ensure all-day comfort under any outfit.
NEXT LEVEL WARMTH - Ultra-soft micro-fleece fabric locks in heat without bulk, keeping you cozy in the coldest conditions.
MOVE FREELY STAY SNUG - Four-way stretch design offers a second-skin fit that supports full range of motion and squat-proof durability.
STAY DRY STAY COMFORTABLE - Moisture-wicking fabric rapidly transports sweat away, eliminating clammy discomfort during active or leisure wear.
VERSATILE COLD WEATHER ESSENTIAL - Perfect base layer for skiing, motorcycling, hiking, or everyday winter wear—your go-to for warmth and style.

The PISIQI mens B Soft thermal underwear set combines ultra-soft polyester micro-fleece with 4-way stretch fabric to deliver superior warmth, breathability, and mobility. Designed with moisture-wicking technology and a tagless, lightweight waistband, this base layer offers all-day comfort and durability. Ideal for outdoor sports and cold-weather activities, it fits snugly like a second skin to maximize heat retention while keeping you dry and comfortable.

Specifications

ASIN	B0CM1C96NM
Best Sellers Rank	#5,377 in Fashion ( See Top 100 in Fashion ) #28 in Men's Thermal Underwear Sets
Customer reviews	4.5 4.5 out of 5 stars (3,112)
Date First Available	12 July 2019
Department	Mens
Is Discontinued By Manufacturer	No
Item model number	a
Manufacturer	PISIQI
Product Dimensions	28 x 20 x 5 cm

Reviews

M**O

Nice and snug

Just what you expect from it. Went to armenia and it did not fail me. Good quality too

7.07.2020

V**I

Good quality

Very good quality!! Perfect for wearing under snow clothes.

6.12.2019

J**W

This is 2 size down on your normal size but material is very good, and warm!

Material is very good but the size is not good 2 sizes down

2.11.2019

G**O

pricey but worth it.

8.02.2020

K**A

Waste of money

Extremely dislike...not much quality to use in winters.

24.11.2020

A**A

Nice material

Nice one

30.01.2020

T**4

Doesn't make you warm at all

It doesn't feel any warmer. The product seems to be completely made of Spandex only.

3.12.2020

D**B

worked great helped me stay warm during ridding early cold mornings. :)

22.04.2021

F**K

يدفي تحت الملابس

19.12.2025

J**.

Evito comentario No es lo que necesitaba Para ser térmico Yo lo regresaría No es un gran protector para el frío

16.01.2026

B**Z

I purchased the PISIQI Thermal Underwear Set for a recent ski trip, and I’m extremely impressed with the quality and comfort. The material is ultra-soft and stretchy, making it feel more like athletic wear than traditional thermal underwear. The fleece lining is incredibly warm without being bulky, and it kept me cozy even in freezing temperatures. The fit is true to size and offers just the right amount of snugness without feeling restrictive. I wore the set under my ski gear and also used it for layering during outdoor hikes — it worked great in both situations. It also washes well without losing shape or softness. If you’re looking for a warm, lightweight base layer that feels good on your skin and performs well in winter conditions, I highly recommend this set. Great value for the price!

21.07.2025

G**S

Very good fit good quality material and it's warm and comfortable perfect fit I love the lining feels very comfortable

27.12.2025

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