This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.

Menu

O'Neill Logo

Sign in to see your rewards

Sign in

Your Cart

Congratulations! Your order qualifies for free shipping You are $115 away from free shipping.
Sorry, looks like we don't have enough of this product.

Your Items (0)
Don't Forget
${ product.mappings.core.name.replace('quot;', '"').replace('&', '') }
${ formatPrice(parseFloat(product.mappings.core.price) * 100) } ${ formatPrice(parseFloat(product.mappings.core.msrp) * 100) }
Loading

SIZE CHART

Wetsuit Footwear Sizing

Products with numeric sizes are in Men's US sizes.

Body Measurements in Inches

Youth products are notated by "Youth" in the product title.

Size Men's US Size Youth US Size
XS 5 - 6 8 - 9
S 7 - 8 10 - 11
M 9 - 10 12 - 13
L 11 - 12 1 - 2
XL 13 - 14 3 - 4

View all size charts here.

Product Details

Product Details

Stay covered Head-to-Toe in O'Neill's premium lineup of equipment designed to shield you from the harshest conditions. Our world-class athletes search the planet for perfect surf, the R&D team at Area 52 developed product to allow you to perform in the most extreme elements and excel in the coldest climates.

  • Anatomical Fit
  • Split-Toe for Improved Stability
  • Minimal Design
  • Anti-Flush Shin Strap
  • Micro-Diamond Grip Sole for Lightweight Board Feel
  • Construction
  • Glued and Blindstitched Seams
  • FluidFlex Neoprene
  • Exterior Instep: Durable Krypto Armor
Warning Icon

WARNING: Cancer and Birth Defects - www.P65Warnings.ca.gov.

SKU: 4786|002|5
Shipping & Returns

Free shipping on orders over $115 when you join O'NEILL REWARDS.

30-day returns & exchanges (unless marked Final Sale). Learn more about shipping & returns HERE.

Ninja St 3Mm Boot - Black | O'Neill

Ninja ST 3mm Boot

$64.95
Color: black
size:5
Kryptoarmor tech icon

Kryptoarmor

Wear it With
${ product.mappings.core.name.replace('quot;', '"').replace('&', '') }
${ formatPrice(parseFloat(product.mappings.core.price) * 100) } ${ formatPrice(parseFloat(product.mappings.core.msrp) * 100) }
Loading
[{"variant_id":"49311771919" , "metafield_value":""},{"variant_id":"49311771983" , "metafield_value":""},{"variant_id":"49311772047" , "metafield_value":""},{"variant_id":"49311772111" , "metafield_value":""},{"variant_id":"49311772175" , "metafield_value":""},{"variant_id":"49311772303" , "metafield_value":""},{"variant_id":"49311772367" , "metafield_value":""},{"variant_id":"49311772431" , "metafield_value":""},{"variant_id":"49311772495" , "metafield_value":""}]

Ninja ST 3mm Boot

$64.95

Overall rating: 4.9166665 / 5 from 12 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["fit","booties"].

Review highlights

Reviews

Nicely made. Runs small

"Nicely made. Runs small"

Scott W. (4/5)

Good for summer

"Good for summer"

Keith S. (5/5)

Ninja

"Don’t change it keep making it the only one like it in the industry."

Ken K. (5/5)

Agile boot

"Great fit, good sensitivity on the board, easy to turn inside out for cleaning and drying. The long velcro strap gets stuck on other stuff in my bucket after a surf, but that's a small, manageable thing."

Michael P. (5/5)

Appropriately Named

"Awesome booties. You may forget you have them on. Though there is not much to them, they appear well made enough to last at least a couple of winters. They are true to size."

julio t. (5/5)

My favorite

"I originally got these to work with fins during the winter/spring for bodysurfing. I am in Northern California and most 3mm fin socks don't cut it when it's really cold. That said, I have found myself wearing them during summer/fall while surfing, rather than my usual 5mm booties. The Ninja are amazingly warm for 3mm, and are so light that I forget I am wearing booties. Just ordered another pair when they became available."

paul p. (5/5)

Happy feet.

"I love these booties. Not too thick. Warm enough and I can still feel my board and feet after I surf. I was stung by a stingray through the thick part of the bootie and the Ray barely penetrated the rubber part so the booties saved me from a real direct hard hit. Great booties."

Dawn P. (5/5)

Awesome

"Great booties. Perfect thickness"

Joshua L. (5/5)

Gift

"Bought them for my son for Christmas. He says they fit great."

Ellen B. (5/5)

Very good. Easy on and

"Very good. Easy on and off and a good fit."

Terence K. (5/5)

Q&A