The new shape of men’s fashion
Core Runner Boxer Geir Green
True to size. For loose fit, go one size up.
Fit
- Description
- Style and Fit
- Fabric and Care
- Shipping
Runner boxer with classic cotton comfort and a modern, athletic cut
The C-IN2 Core Runner Boxer takes inspiration from classic military runner shorts, reworked into a streamlined boxer silhouette built for ease and movement. Designed with a runner cut and signature side insets, it delivers a sleeker, more flattering fit that opens up the leg without feeling oversized.
Made from breathable 100% cotton, this boxer offers soft, natural comfort for all-day wear. A functional button fly adds everyday practicality, while the shorter 3" inseam keeps the profile light and mobile without excess bulk. Finished with an exposed logo waistband, it’s classic Core comfort—refined with athletic intent.
Fabric Type & Performance
100% cotton fabric designed for breathable comfort and a soft, natural feel throughout the day.
Fabric Composition
100% Cotton.
Fit & Silhouette
Runner boxer silhouette inspired by military runner shorts, featuring side insets for a clean, athletic shape.
Rise
Mid-rise design that sits comfortably at the waist for a familiar, easy fit.
Inseam
3" inseam for a shorter length that allows freedom of movement without bulk.
Fly Construction
Functional button fly designed for everyday convenience and ease of use.
Leg Openings
Runner-style leg openings designed for comfort, airflow, and mobility.
Waistband
1.5" exposed elastic waistband with engineered C-IN2 branding.
Care Instructions
Machine wash.
Imported.
Core Collection
The Core collection is built around uncompromising comfort and everyday reliability. Made from premium 100% cotton, each piece delivers breathable softness and a natural feel designed for all-day wear.
As C-IN2’s most essential collection, Core offers a wide range of styles—built to fit seamlessly into your daily rotation while delivering consistent comfort and dependable support.
Model's height is 6"1'/185 cm, and he is wearing size M.
Get free shipping for US orders over $99.
Discreet packaging: plain poly bag or brown box.
For shipping info: C-IN2 Shipping.
Discreetly shipped in a plain brown box or poly bag.
Complete the Set
Need help?
Send us an email at support@c-in2.com.
- Comfort
- Fit
- Quality
- Material
- Appearance
- HAHarold A.Verified BuyerReviewingCore Runner Boxer Geir GreenI recommend this productBody Type MuscularHeight 5' 4-5' 6Normal Size Worn SSize in Other Brands SSize Bought MRated 5 out of 5 stars2 weeks agoI am amazed…
The Geir Green color looks even better in person. These boxers fit perfectly and feel very comfortable with enough stretch and support. I like how the fabric stays cool and smooth even after wearing them for hours. The waistband feels secure without being too tight, and the overall quality feels premium. I’d definitely purchase more colors in this style.
- HAHarold A.Verified BuyerReviewingCore Runner Boxer Grey HeatherI recommend this productBody Type MuscularHeight 5' 4-5' 6Normal Size Worn SSize in Other Brands SSize Bought MRated 5 out of 5 stars2 weeks agoI love this boxer.
I’ve worn these a few times already and I’m really impressed with the comfort and fit. The material feels soft, breathable, and lightweight while still giving good support throughout the day. The Grey Heather color looks clean and stylish, and the fit stays comfortable without riding up. Great for both everyday wear and workouts. Definitely one of my favorite boxer styles from C-IN2.
- DNDilshod N.Verified ReviewerReviewingCore Runner Boxer WhiteBody Type MuscularHeight 5' 7-5' 9Normal Size Worn MSize in Other Brands MSize Bought MRated 3 out of 5 stars3 days agoWrong color shipped
I ordered white and blue colors but they shipped both white . Overall, the quality of the product is good.
- MGMathew G.Verified BuyerReviewingCore Runner Boxer Raj RedI recommend this productBody Type Slim, Tall, Big JunkHeight 5' 10-6' 0Normal Size Worn MSize in Other Brands MSize Bought MRated 4 out of 5 stars2 weeks agoComfortable and airy.
Comfy, but thinner fabric than other Core line underwear. The slightly elastic leg stitching keeps everything inside when sitting, avoiding and unintentional peek-a-boos.
- BBerwynReviewingCore Runner Boxer Yon YellowI recommend this productRated 5 out of 5 stars1 month ago5 Stars
I love the cotton boxer underwear that i ordered. They are so nice and comfortable.