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- – 6-month term
- – No impact on credit to apply
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Sunday, Nov 15
Recently Viewed
At a glance
- Condition
- New
- Size
- Medium
- Model
- NB4003 900
- Weight
- 1 lb
- Material
- Cotton
- Age Range Description
- Adult
- Style Number
- NB2440-421-M
Description
The Calvin Klein original—first introduced in 1981, the world’s most iconic mens underwear is timeless in pure cotton with a moisture-wicking finish for the ultimate in comfort.
Specs 24
| Item Weight | 1 Pounds |
|---|---|
| Item model number | NB4003 900 |
| Department | mens |
| Manufacturer | Calvin Klein |
| Brand Name | Calvin Klein |
| Age Range Description | Adult |
| Unit Count | 7 Pack |
| UPC | 608926230039 |
| Global Trade Identification Number | 39 |
| Style Number | NB2440-421-M |
| Manufacturer Part Number | NB2440-421-M |
| Item Type Name | Boxer Briefs |
| Color | 3 Blue Depths, 2 Boardwalk Blue, 2 Water Reflection |
| Style Name | Cotton Classics 7-pack Boxer Brief |
| Pattern | Solid |
| Rise Style | Low |
| Bottom Style | Boxer Briefs, Boxers |
| Material Type | Cotton |
| Fabric Type | 100% Cotton |
| Product Care Instructions | Machine Wash |
| Apparel Fabric Weight Class | Lightweight |
| Apparel Fabric Stretch | No Stretch |
| Garment Size Country | United States |
| Size | Medium |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 15
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great CK underwear for its price!
Size: Medium
Color: 3 Black, 2 Grey Heather, 2 White
My go-to underwear. Have bought multiple sets and have been wearing for a good period now. Very comfortable and it is very durable. Does wear out like other underwears and fits perfectly. Recommend buying
Reviewed in the United States on September 16, 2025 by Ho
Comfortable and breathable
Size: Medium
Color: 3 Blue Depths, 2 Boardwalk Blue, 2 Water...
They are very comfortable fit. My boyfriend is 5’11 135 pounds and they come mid thigh on him! They look Nice and hold everything comfortably!
Reviewed in the United States on April 1, 2026 by Kyla Stanback
Timeless
Size: Medium
Color: 3 Black, 2 Grey Heather, 2 White
Best on a market
Reviewed in the United States on January 21, 2026 by giorgi k.
The Definitive "Classic" Fit—Pure Cotton Comfort for Everyday Wear
Size: Large
Color: 3 Blue Depths, 2 Boardwalk Blue, 2 Water...
Fit & Fabric Analysis: I’ve been wearing these for [Time Period], and it’s important to know that these are the 100% Pure Cotton versions. If you are used to the CK "Stretch" line, these feel different—they are much more breathable and airy, which is great for sleeping or long office days, but they don't "hug" the leg quite as tightly. Shrinkage: I found that these did shrink slightly in the first wash (Warm wash/Medium dry). If you are at the top end of your size, you might want to size up. Rise: These are a true full rise. They sit comfortably above the hip, providing full coverage without feeling restrictive.
...
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Reviewed in the United States on February 7, 2026 by Viral Fixes Daily
Shrinks
Size: Small
Color: 3 Blue Depths, 2 Boardwalk Blue, 2 Water...
The color looks great at first, but it tends to wash off and lightly stains other clothes. After the first wash, it also shrank slightly, which was disappointing. The fit is a bit longer than other Calvin Klein underwear I've purchased. It’s still comfortable, but the sizing and color quality could be better. Overall, not bad—but not quite up to the usual Calvin Klein standard.
...
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Reviewed in the United States on October 20, 2025 by XYZ
Comfy fit
Size: Medium
Color: 7 Black
Bought for my grandson. Only ones that he likes.
Reviewed in the United States on March 8, 2026 by Scott
👍🏻👍🏻
Size: X-Large
Color: 7 Black
👍🏻👍🏻
Reviewed in the United States on March 27, 2026 by Lewis Musick
Do not buy Calvin Klein products. They are no longer a quality producer.
Size: Medium
Color: 7 Black
Take a look at any Calvin Klein ad. The clothes fit impecably. I enjoyed that experience for many years and CK was my default brand for undergarments. Something happened at CK. The brand that was known for a luxe product has fell short in every aspect. Across two different orders (different colors) I bought around 10 pairs of these. When they arrived I just cleaned out my dresser drawers and felt good in knowing I was set for a short while. The disappointment set in on day one after I got home from work. The underwear fit snug and contoured my body as expected at the beginning of the day. During the day I noticed the underwear riding up my leg. When I got home my nice new briefs looked like boxers. I thought it was a fluke. I put on another pair to sleep in. When I woke up the briefs looked like they were streched in some WWF wresting match. Yet another pair of boxers. This happened with all the CK undergarments. After the first wash they returned to semi normal shape but then they just give way during the course of the day. There is nothing unusual about my body build and they are sized properly. I reached out to CK to find out what happened to their quality control. They rebuffed my request by first saying they could not accept claims against a garment that was worn. Then they further insulted me by offering me a $20 credit towards my CK account. I don't even have a CK account. I told them to keep the money and use it to fund a proper Quality Control division. I was no longer gonna weak their moniker on my waist. I truly beleive I could have gone to any big box store and bought plain white Fruit of the Loom briefs and got better quality and service in the event of quality problems. Save yourself the frustration. If you want a luxe product this is no longer the brand you remember.
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Reviewed in the United States on September 28, 2021 by Daniel Perez