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The first drop. 1,200 pairs. Three colourways.

KS-01
Signal

Drop opens in

A road shoe with two foams, a one piece knit upper and 248 grams of weight. One run of 1,200 pairs, numbered inside the tongue.

Reserve a pair
  • Drop opens October 30
  • 1,200 pairs
  • Three colourways
  • Los Angeles
  • $185
  • Free shipping in the United States

Five beats

Built from the ground up

Scroll to turn the shoe through the five parts that make it work, from the outsole to the heel. Use the numbers on the right to jump to any part.

  1. 01 Beat one of five

    Outsole

    Rubber that grips wet concrete and still weighs almost nothing.

    Compound
    KR-7 carbon rubber, 62 Shore A
    Lug depth
    3.2 mm in the forefoot, 2.6 mm in the heel
    Rubber coverage
    41 percent, placed where the foot pushes off

    The outsole is cut away under the arch to save weight. Rubber stays only on the zones that touch the ground: the outer heel, the ball of the foot and the toe. The pattern sheds water to the sides instead of trapping it.

    The KS-01 tipped up to show its white outsole, with a strip of the knit upper at the edge. The KS-01 tipped up to show its white outsole, with a strip of the knit upper at the edge. The KS-01 tipped up to show its white outsole, with a strip of the knit upper at the edge.

  2. 02 Beat two of five

    Midsole

    Two foams, one stack, an 8 mm drop.

    Foam density
    0.14 g/cm3 soft layer over a 0.21 g/cm3 firm layer
    Stack height
    34 mm at the heel, 26 mm at the forefoot
    Drop
    8 mm

    The soft layer sits against your foot and takes the first impact. The firm layer underneath stops the shoe from bottoming out and returns the energy. Together they feel soft at the first step and stable at the fortieth minute.

    The KS-01 side on, showing the two layer white midsole with the foam mark along the heel. The KS-01 side on, showing the two layer white midsole with the foam mark along the heel. The KS-01 side on, showing the two layer white midsole with the foam mark along the heel.

  3. 03 Beat three of five

    Upper

    One piece of knit with three zones, so there are no seams to rub.

    Toe box
    Open knit, 11 percent more airflow than the midfoot
    Midfoot
    Dense knit that holds the foot without pressure points
    Material
    71 percent recycled polyester yarn

    The knit is made in a single piece on a flat bed machine. The toe box is open so your foot can spread. The midfoot is tight so it stays put. The heel is stiffer so it holds its shape after hundreds of kilometres.

    The KS-01 from above and in front, showing the one piece knit upper, the laces and the toe box. The KS-01 from above and in front, showing the one piece knit upper, the laces and the toe box. The KS-01 from above and in front, showing the one piece knit upper, the laces and the toe box.

  4. 04 Beat four of five

    Lacing

    A lockdown system that holds the foot without crushing it.

    Eyelets
    7 per side, with a heel lock loop at the top
    Laces
    Flat woven, 9 mm wide, 140 cm long
    Internal strap
    Knit cage that pulls the midfoot toward the heel

    Flat laces spread the pressure across the top of the foot. An internal strap links the lowest eyelets to the heel, so tightening the laces also pulls the heel back into its pocket. The top loop gives you a third lock if you want one.

    A close view from above of the flat laces, the eyelets and the internal strap of the KS-01. A close view from above of the flat laces, the eyelets and the internal strap of the KS-01. A close view from above of the flat laces, the eyelets and the internal strap of the KS-01.

  5. 05 Beat five of five

    Heel

    A firm counter and a pull tab you can find with one finger.

    Counter
    Molded TPU, 2.2 mm thick
    Pull tab
    Woven loop, rated to 40 kg
    Collar
    Padded with 6 mm of open cell foam

    The counter keeps your heel from rolling inward. The collar is padded just enough to stop slip without feeling bulky. The pull tab is stitched through the counter so it will not tear off on a rushed morning.

    The KS-01 from behind, showing the molded heel counter, the woven pull tab and the padded collar. The KS-01 from behind, showing the molded heel counter, the woven pull tab and the padded collar. The KS-01 from behind, showing the molded heel counter, the woven pull tab and the padded collar.
  • Reserve now, pay later
  • Holds last 48 hours
  • Two pairs per person
  • Numbered inside the tongue
  • No restock

Three colourways, 400 pairs each

Choose your pair

$185 a pair with free shipping in the United States. Pick a colourway, pick a size, and add it to your reservation. You can reserve up to 2 pairs.

Signal in detail

Signal is built to be seen. The orange red is the same shade used on road signs, chosen so drivers notice you at dusk. It is the colourway most people reserve first, so its sizes move fastest.

Upper
Orange red engineered knit
Overlays
Black TPU film at the eyestays and heel
Midsole
Bone white dual density foam
Outsole
Black carbon rubber
Laces
Flat woven, orange red

Size, US men’s. Colourway: Signal

Sizing guide

Struck through sizes are sold out. Sizes with a count are almost gone.

Choose a size to continue.

Tech specs

The numbers

Fit and sizing

Sizes
US 5 to 13 in half sizes
Width
D, standard
Fit
True to size. Go up half a size if you are between sizes.
Last
Kestrel L2, 11 mm toe spring
Insole
5 mm removable, open cell foam

Weight and geometry

Weight
248 g, US men's 9
Stack height
34 mm heel, 26 mm forefoot
Drop
8 mm
Use
Daily training and road runs up to 25 km

Midsole

Top layer
0.14 g/cm3 EVA and TPE blend
Bottom layer
0.21 g/cm3 EVA and TPE blend
Energy return
63 percent, measured by drop test at 5 J
Shank
None. The firm layer carries the load.

Outsole

Compound
KR-7 carbon rubber, 62 Shore A
Lug depth
3.2 mm forefoot, 2.6 mm heel
Coverage
41 percent of the footprint
Wet grip
0.58 coefficient of friction on wet concrete

Upper

Construction
One piece engineered knit, three zones
Yarn
71 percent recycled polyester, 29 percent nylon
Overlays
TPU film, heat bonded, no stitching
Heel counter
Molded TPU, 2.2 mm

Care and origin

Cleaning
Soft brush and cold water. Do not machine wash.
Drying
Air dry away from heat
Made in
Ho Chi Minh City, Vietnam
Production run
1,200 pairs, numbered inside the tongue

Sizing guide

Find your size

The KS-01 runs true to size, with a standard D width. If your foot falls between two sizes, take the larger one.

  1. Stand on a sheet of paper with your heel against a wall.
  2. Mark the tip of your longest toe and measure from the wall to the mark, in millimetres.
  3. Find that length in the table and add 5 mm of room if you wear thick socks.
US size Foot length Inches
5 232 mm 9.1
5.5 237 mm 9.3
6 241 mm 9.5
6.5 245 mm 9.6
7 249 mm 9.8
7.5 254 mm 10.0
8 258 mm 10.2
8.5 262 mm 10.3
9 266 mm 10.5
US size Foot length Inches
9.5 270 mm 10.6
10 275 mm 10.8
10.5 279 mm 11.0
11 283 mm 11.1
11.5 287 mm 11.3
12 292 mm 11.5
12.5 296 mm 11.7
13 300 mm 11.8

Lookbook

Out before the city wakes up

See all twelve frames
A skater in the air above a concrete bowl, under a row of palm trees at the beach.

Worn: Signal, US 10

Venice bowl, first light Venice, 6:40
Three runners in silhouette against a low sun on an empty road.

Worn: Midnight, US 8

Three abreast, low sun Playa Vista, 6:15
Concrete freeway overpasses curving over an empty lane.

Worn: Chalk, US 9.5

The interchange, empty lane Century, 5:50
Two runners in motion blur on a city street, bare trees behind them.

Worn: Signal, US 11

Tempo pair, Sunday long run Downtown, 7:05
A single person sitting on a wide flight of concrete steps between two columns.

Worn: Chalk, US 7

Rest between repeats Exposition Park, 12:20
Curving track lanes with painted distance markings.

Worn: Signal, US 9

Lane one, 400 m El Camino track, 17:30

Questions

Before you reserve

All questions
When does the drop open?

The countdown at the top of the home page shows the exact time in your own time zone. You can reserve pairs before it reaches zero. Your hold starts when the drop opens, not when you reserve.

How many pairs are there?

There are 1,200 pairs in total, 400 in each of the three colourways: Chalk, Midnight and Signal. Each pair is numbered inside the tongue. We will not restock this run.

Will there be another drop?

Yes. The next drop is a new colourway on the same last. Join the waitlist and tell us your size and favourite colourway so we can plan quantities. We email the waitlist before anyone else.

Do I pay when I reserve?

No. Reserving holds your pairs for 48 hours from the moment the drop opens. Payment is a separate step after that. This site is a demonstration, so it stops at the reservation: no payment is taken and no email is sent.

How many pairs can I reserve?

Two pairs per reservation, in any colourways and sizes. The limit keeps the drop fair. Each pair is its own line in your cart, so you can choose a different size and colourway for each.

What if a size sells out while I am reserving?

Stock is checked at the moment you press Reserve. If a pair has gone, nothing is held, and the cart shows which line to change. Pick another size or colourway and try again.

Next drop

Missed this one, or want the next

The next drop is a new colourway on the same last. Tell us your size and favourite colourway and we will write to the waitlist first.

Your reservation

Nothing reserved yet. Pick a size above.

Choose a pair