Just ordered for first time
Very good product. How long they last will be next question. Optimistic they will last a long time.
By UnderFit C.
Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
365 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
UnderFit undershirts are cut longer and lightly hug your hips and below, to stay tucked in all day. Our fabric is ideal for undershirts due to its exceptional softness, advanced moisture absorption, odor resistance and superb breathability. If you want to remain less comfortable in your run-of-the-mill undershirt, by all means, DON’T buy an UnderFit.
UnderFit (underfit.com) has 365 customer reviews on The Fair Hearing, with an average rating of 4.5 out of 5.
365 approved reviews, newest moderated first
Very good product. How long they last will be next question. Optimistic they will last a long time.
By UnderFit C.
Honest and fast
By UnderFit C.
Best underwear ever!
By UnderFit Customer R.
I am a tall man and was skeptical of buying a T which was not a Tall. Glad I bought, fits comfortably close to the skin, cool, and lightweight.
By Dale
I bought underfit tee shirts for my son... when he asked for more and my husband asked for some...I knew they must be fabulous... no one knows your wearing them...nice snug fit...warm in the winter....cool in the summer...you will not regret this purchase.
By Happy C.
Great fit, quality material. Wears and washes well. I highly recommend these t shirts.
By Cheryl M.
Love the vests. However they do eventually lose their smooth feel and tightness and start to stretch.
By UnderFit C.
I liked the fit and fabric. The shirt did seem to yellow quickly though. Overall good shirts though.
By UnderFit C.
Response from UnderFit· Mar 22, 2018
Dear Customer, The yellowing of the shirts is due solely to using anti-perspirant deodorant. The chemicals in the anti-perspirant and some standard deodorants react with sweat to turn it yellow. Sweat is clear. Thank you for your business