Wear it

Wear it

and Flex

get flex

Your new support system

  • Everyday movement.

  • Flex Brief

    Flex Brief

    Flex Brief

    $34
    $34
  • Flex Boxer

    Flex Boxer

    Flex Boxer

    $38
    $38

  • High-output movement.

  • Hard Boxer

    Hard Boxer

    Hard Boxer

    $38
    $38
    Basic. Daily. Essential.
  • Hard Brief

    Hard Brief

    Hard Brief

    $34
    $34
    Basic. Daily. Essential.

  • Recovery + downtime. Coming Soon.

One support system. Three ways to wear it.

KING is engineered underwear built around a proprietary support system.

Adaptive support / everyday movement

SHOP FLEX

Maximum support / high-output movement

JOIN WAITLIST
Let's compare our BDE

A guide to our support system.

  • Black
  • Black, White
  • Coming Soon
Fabric

  • HardWear

    Technical Performance Knit

    Moisture Wicking

    Quick-Dry

  • FlexWear

    Adaptive Stretch Knit

    Lightweight

    Highly flexible

  • SoftWear

    Premium Cotton Blend

    Breathable

    Naturally Soft

Feel
  • Structured
  • Adaptive
  • Relaxed
Compression level
What customers say

Best for:

  • Training

    Running

    High-output days

    When you need to go hard.

  • Everyday wear

    Walking + travel

    Working

    Days that require a little more flexibility.

  • Recovery days

    Lounging + sleeping

    Low-impact days

    Sundays

Starting at

Hear it from the kings.

4.92 ★ (132)
Verified