Memorial Day Sale
Up to 30% off this year’s gear
More Ways To Save
Memorial Day special deals
Psycho Tech 5mm ST Bootie - Men's
Size:
Quantity
Join Summit Club+ and
Warning: California Proposition 65
Psycho Tech 5mm ST Boot keeps feet warm and balanced in icy lineups
What Our Gearhead® Experts Are Saying:
"These boots are a winter surf essential for me. The split-toe keeps my footing solid, and the TechnoButter lining adds serious warmth without the bulk. They seal well, stay snug, and hold up session after session in frigid water."
When we’re chasing winter swells in cold water breaks, the O’Neill Psycho Tech 5mm ST Boot keeps our feet warm, locked in, and protected from rocky entries and long paddle-outs. These boots are built to handle extreme surf conditions with an anatomical fit, durable outsole, and a split-toe design that improves balance and board feel.
O’Neill’s signature TechnoButter 3 neoprene and Firewall lining deliver insulation without weight, while the exterior Fluid Seam Welds block water entry. The addition of TB3X taped seams on the inside adds durability and comfort, and a sturdy instep strap locks in support through powerful turns. From Santa Cruz to the PNW, these boots are designed to perform in cold, demanding conditions.
Details
- Cold-water surf boot built for warmth, grip, and comfort
- 5mm TechnoButter 3 Firewall neoprene offers lightweight insulation
- Fluid Seam Welds and TB3X interior taping block water entry
- Durable rubber outsole protects against reefs and rocks
- Split-toe construction improves balance and control
- Instep strap and anatomical fit reduce internal movement
- Heel pull tab makes for quick on and off
- Designed for cold surf sessions and harsh coastal conditions
- Item #ONEG3OU
- Material
- [face fabric] TechnoButter 3, [lining] TechnoButter 3 Firewall
- Thickness
- 5mm
- Closure
- hook-and-loop
- Sole
- rubber
- Manufacturer Warranty
- limited 90 days
- Activity
- surfing

First Name In The Water
From the invention of the first neoprene wetsuit and first surf shop, O’Neill continues to be a leading youth lifestyle brand that is always the first name in the water.
This product can expose you to chemicals including Chloroprene which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.