Why Choose iB Underwear?

Adjustable Fit
Drawstring waistbands for the perfect level of comfort.

Designed for Comfort
Made for work, play, or just relaxing.

Built to Last
Won’t fall apart like multi-pack underwear.

Ideal for Sensitive Days
Perfect for IBS, bloating, or everyday comfort.
The Most Comfortable Underwear You'll Ever Wear!
A Solution Born From Experience
I’m Jack, founder of iB Underwear, and I started this company at age 48 because I have Irritable Bowel Syndrome (IBS) and I need the most comfortable underwear imaginable. Having suffered elastic waistbands my whole life, I understand how clothing can aggravate symptoms like bloating, cramping, and abdominal sensitivity. So, I set out to create the most comfortable men's underwear the world has ever seen, and I'm pretty sure I did.

What our customers are saying
★★★★★
"I was given a pair to review but honestly I’m considering getting some more! These boxer briefs are so soft you’ll notice the huge difference a draw string can make for a waist band. I got the medium size and it’s a great fit. This would also make for a good gift! Overall very satisfied and glad I was trusted to review this. Highly recommend!"

★★★★★
"I really like these… at first I ordered a size that shrunk when I washed them. I contacted them and they immediately sent out a replacement pair. Great customer service and a great product… I’ve ordered another pair and look forward to receiving them!"

★★★★★
"They are light and thin, but you can’t see through them. Seem to be built with high quality fabric and stitching. Wearing them, they are extremely comfortable thanks to the lack of elastic on the waistband. It is noticeably more comfortable. As for the fly, for me it is the signature feature. It is a revelation."

Save More with Our Comfort Bundles
Take the stress out of daily comfort with our specially curated bundles. Perfect for building your wardrobe or gifting life-changing comfort to someone you care about.
