3:Sixteen Aero Calf Sleeve™ (pair)
SKU: 36643517003

3:Sixteen Aero Calf Sleeve™ (pair)

Sale price$67.49 Regular price$74.99
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

3:Sixteen Aero Calf Sleeve™ (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 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. 

  • 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.

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

Warranty Information

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: 36643517003

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 380 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Staisha Miles
Belleville, US
★★★★★ 5
True to size
Size: 7, Color: Knit Navy
True to size, comfortable shoes being on your feet all day, I wear them with no sock and haven’t had any issues with blisters, extremely cute style, quality is great, value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
R
Verified Purchase
Renee M. Willimas
Port Orchard, US
★★★★★ 5
Cute denim, nice leather ties, awesome price and fits as they should. Would buy again.
Size: 8.5 Wide, Color: Linen Navy
ordered 8 1/2 W since toe box is fairly narrow. Fits perfectly. Cute with jeans, leggings and shorts. Decent arch support, nice soles and SUPER value for the price (These are 80 at shoe stores locally) Would buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
S
Verified Purchase
Skribbles76
Belleville, US
★★★★★ 4
Comfy and cute.
I was looking for a Converse alternative for a multitude of reasons. These were perfect. I love the slip-on style. The leather laces stay in place much better than the Converse cotton laces and there is way more sole support, which is a huge plus. I purchased these in black about a year ago and then went for the camo pair. As for the black pair, I wore them regularly for a year. After that time, the shoe didn't feel as comfortable anymore, and the fabric outer around the ankle began to fray, and the white outer trim was beginning to detach from the bottom sole. With that, I was pleased with how long they lasted. As for the camo pair, I anticipate the same quality and comfort. While super cute, the only draw back is the mismatched pattern. If you look at the pics, the one shoe has more gold embellishment at the toe area and the other one doesn't. This bothers me a bit as I would have liked it to match. Otherwise, I'm happy with both purchases so far and will continue to buy them in the future.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 27, 2023
D
Verified Purchase
Doris Stanley
Omaha, US
★★★★★ 5
Love these
Size: 7, Color: Camo Olive
Love these shoes. Great value and comfortable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
T
Verified Purchase
Texas 12
Whiting, US
★★★★★ 5
Long lasting. Sperry is quality.
Last a long time and still look good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026

recommand products