SKU: 34002878359

3:Sixteen Aero Calf Sleeve™ - Black/White (pair)

Sale price$134.99 Regular price$149.99
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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For Your Every Summer RSVP, with Code: SUMMER15

Description

3:Sixteen Aero Calf Sleeve™ - Black/White (pair)Save up to 12 Watts Athletes can now benefit from the watt saving technology found in our record breaking Aero Bridge Undervest. Compared to aero socks, the extra calf coverage gives even greater aerodynamic and time savings. Saving up to 12 watts, these Calf Sleeves are the best investment on the market, with the highest watt aero gain. Developed Alongside the World's Greatest Utilising the same technology as our Aero Bridge Undervest, the 3: Sixteen

Save up to 12 Watts

Athletes can now benefit from the watt saving technology found in our record-breaking Aero-Bridge Undervest. Compared to aero socks, the extra calf coverage gives even greater aerodynamic and time savings. Saving up to 12 watts, these Calf Sleeves are the best investment on the market, with the highest £/watt aero gain.

Developed Alongside the World's Greatest

Utilising the same technology as our Aero-Bridge Undervest, the 3:Sixteen Calf Sleeve is born. Developed at the Silverstone Sports Engineering Hub and Derby Velodrome alongside the World's greatest engineers and riders. 

The Calf Sleeves were first introduced to the sporting World during the Sub7 / Sub8 challenge, with the design and name 3:Sixteen as a nod towards the 3-hour 16-minute bike leg that was achieved to help guide Joe Skipper to a sub 7-hour Ironman. The team comprised of some of the World's best time-trialists, including Alex Dowsett and recently crowned UCI Hour Record holder Dan Bigham, who crushed the opposing team to deliver one of the most incredible time trials of all time.

Patented Aero-Bridge Technology - How it Works

By stretching smooth fabric over ribbed fabric (raised ridges form a suspension of material like a suspension bridge) to disrupt the airflow by the ridge and then further alter it by the suspended fabric, causing minuscule air particles to enhance displacement of the boundary layer. 

Calf guards can be worn in triathlon competition under your wetsuit and for the duration of the event.

  • Up to 12 Watt saving.
  • Designed for the Sub7 Sub 8 record-breaking challenge.
  • Dan Bigham designed and enhanced.
  • Precisely patterned to maximise aero gains.
  • Aerodynamic materials.
  • TT and track proven.
  • For sizing, measure the widest part of the calf.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 34002878359

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Margarita V.
Belleville, US
★★★★★ 5
My husband never takes them off.
Size: 10, Color: Marine Blue/Bt Tan
Excellent — exactly what you would expect from the brand. The sizing is accurate, and the quality and comfort are great. I would definitely recommend it.
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Reviewed in the United States on May 19, 2026
A
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A
Omaha, US
★★★★★ 5
Great shoes
Size: 9, Color: Marine Blue/Bt Tan
very comfortable and breathable. looks very nice too.
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Reviewed in the United States on March 27, 2026
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Verified Purchase
christian richardson
Chelsea, US
★★★★★ 4
Great shoe option
Size: 12, Color: Black/Magenet/British Tan
Dad wears these pretty often for work, he has given great review to me haven’t heard any complaints. Comfortable but appropriate for work dress.
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Reviewed in the United States on April 8, 2026
A
Verified Purchase
Angela
Birmingham, US
★★★★★ 5
Great Deal!
Size: 10, Color: Marine Blue/Bt Tan
I got these on sale for a really great price, and my son-in-law absolutely loved them. He was so happy when he opened them - he only wears Cole Haan shoes because he has a wide foot and he’s on his feet all day as a car sales man. The brown and black in the design makes them super versatile, so he can wear them with just about anything. They look great, feel well made, and were definitely worth it.
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Reviewed in the United States on January 13, 2026
M
Verified Purchase
Mark D Brown
Carnegie, US
★★★★★ 5
Very comfortable
Size: 9, Color: Marine Blue/Bt Tan
Great shoe. Very comfortable. Feels like a light sneaker. I love them going to buy another pair asap
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Reviewed in the United States on April 15, 2026

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