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Introducing

HEAVYKNITx Underwear

Because you deserve underwear that will slow you down and weigh you down.

Finally, the heft and bulk you’ve been weighting for. Our new HEAVYKNITx underwear is built to last forever.

Harder Workouts

Performance fabrics are a thing of the past. The secret to a serious workout is 40 pounds of a chunky metal blend.

Every Detail Matters

No-roll waistband (not guaranteed)

Built-in gravity fly (like a weighted blanket for your boys)

Chain-link heat zones (for enhanced overheating)

April Fool's.

The HEAVYKNITx Underwear isn’t real… yet.

Fortunately, we have a much more conventional (and way more comfortable) underwear: AIRKNITx, our lightest, most breathable underwear.

Shop Underwear

Shop AIRKNITx

True Black | Front view of AIRKNITx HD Boxer Briefs in True Black

AIRKNITx HD Boxer Brief $28

True Black
Charcoal Heather Angled Color Block | Front view of AIRKNITx Trunk in Charcoal Heather Angled Color Block

AIRKNITx Trunk $26

Charcoal Heather Angled Color Block
Blue Ice Heather | Front view of AIRKNITx Brief in Blue Ice Heather

AIRKNITx Brief $24

Blue Ice Heather
Charcoal Heather | Front view of Airknitx 8" Boxer Brief in Charcoal Heather

AIRKNITx 8" Boxer Brief $32

Charcoal Heather