[Developed by a Dermatologist and an Engineering Doctor] Boxer Briefs, 3-Pack, Highly Breathable, Low-Rise, Closed Front, 3D Design, Antibacterial and

✅【How to Choose Your Size ①】For those who prefer a snug fit ▶︎ Please choose the size indicated in the size chart (applicable size chart)! This will prevent shifting during exercise and provide a comfortable fit.

✅【How to Choose Your Size ②】For those who prefer a loose, non-restrictive fit ▶︎ We recommend choosing one size larger than the size chart (applicable size chart)! This is ideal for those who want to relax or prefer a more comfortable fit.

✅【The Ultimate Men's Underwear】2.18 times more elastic! Synchro Air Skin Fit x 3D Fit Pressure Optimal Mapping Technology creates the ultimate comfort (boxer briefs/closed front/low rise).

✅【Developed by a Dermatologist x Doctor of Engineering】Developed jointly by Dr. Goshun Ide, a practicing dermatologist (12 years of clinical experience), and Dr. Kazuhiro Matsui, a Doctor of Engineering from the University of Tokyo (11 years of development experience), integrating knowledge from modern medicine and cutting-edge engineering.

✅【Synchro Air Skin Fit】The three-dimensional shape, derived from a CG reconstruction of the skeletal structure of Japanese men and hundreds of prototypes, achieves the ideal fit!